In this question mathematical tables or calculator should not used. The base and perpendicular height of a triangle measured to the nearest centimeters are 12cm and...

In this question mathematical tables or calculator should not used. The base and perpendicular
height of a triangle measured to the nearest centimeters are 12cm and 8cm respectively;
Find ;
(a) the absolute error in calculating the are of the triangle
b) the percentage error in the area, giving the answer to 1 decimal place

---

---

Kavungya answered the question on June 19, 2019 at 07:22

Exams With Marking Schemes

• Grade 1
• Grade 2
• Grade 3
• Grade 4
• Grade 5
• Grade 6
• Grade 7
• Grade 8
• Grade 9
• PP1
• PP2
• Playgroup
• Form 1
• Form 2
• Form 3
• Form 4

Related Questions

---

• A rectangular plate has a perimeter of 28cm. determine the dimensions of the plate that give the maximum area (Solved)
  

  A rectangular plate has a perimeter of 28cm. determine the dimensions of the plate that
  give the maximum area

  Date posted: June 19, 2019 .    Answers (1)

• A wire of length 5.2m is cut into two pieces without wastage. One of the pieces is 3.08m long. What is the shortest possible length of... (Solved)
  

  A wire of length 5.2m is cut into two pieces without wastage. One of the pieces is
  3.08m long. What is the shortest possible length of the second piece?

  Date posted: June 19, 2019 .    Answers (1)

• The dimensions of a rectangle are 10cm and 15cm. If there is an error of 5% in each of the Measurements. Find the percentage error in... (Solved)
  

  The dimensions of a rectangle are 10cm and 15cm. If there is an error of 5% in each of the
  Measurements. Find the percentage error in the area of the rectangle.

  Date posted: June 19, 2019 .    Answers (1)

• Find the products of 17.3 and 13.8. Find also the percentage error in getting the product. (Solved)
  

  Find the products of 17.3 and 13.8. Find also the percentage error in getting the product.

  Date posted: June 19, 2019 .    Answers (1)

• The mass of a metal is given as 14kg to the nearest l0g. Find the percentage error in this measurement. (Solved)
  

  The mass of a metal is given as 14kg to the nearest l0g. Find the percentage error in this
  measurement.

  Date posted: June 19, 2019 .    Answers (1)

• The length and breadth o a rectangular room are 15cm and 12 cm respectively. If each of these measurements is liable to 1.5% error, calculate... (Solved)
  

  The length and breadth o a rectangular room are 15cm and 12 cm respectively. If each of these measurements is liable to 1.5% error, calculate the absolute error in the perimeter of the room

  Date posted: June 19, 2019 .    Answers (1)

• In the figure below, TA is a tangent to the circle ABCD with centre O. TAD = 48⁰ and BOD = 116⁰ Giving reasons calculate: a) ACD b)... (Solved)
  

  In the figure below, TA is a tangent to the circle ABCD with centre O. TAD = 48⁰ and
  BOD = 116⁰
  
  Giving reasons calculate:
  a) ACD
  b) ABO
  c) ADO
  d) ACB
  e) ATB

  Date posted: June 18, 2019 .    Answers (1)

• In the figure below PQR and S are points on the circumference of a circle centre O. The point TSO and Q lie on a straight... (Solved)
  

  In the figure below PQR and S are points on the circumference of a circle centre O. The point TSO
  and Q lie on a straight line MPT is a tangent to the circle at P.
  
  Find the values of the following angles stating reasons in each case.
  (a) SRP
  (b) ORP
  (c) RPT
  (d) STP
  (e) QPM

  Date posted: June 18, 2019 .    Answers (1)

• The angles of elevation from two points A and B to the top of a storey building are 48⁰ and 57⁰ respectively. If AB =... (Solved)
  

  The angles of elevation from two points A and B to the top of a storey building are 48⁰ and 57⁰ respectively. If AB = 50m and the point A and B are opposite each other; Calculate;
  a) the distance of point A to the building
  b) the height of the building

  Date posted: June 18, 2019 .    Answers (1)

• The angle of depression of a point A on the ground from the top of a post is 18⁰ and that of another point B... (Solved)
  

  The angle of depression of a point A on the ground from the top of a post is 18⁰ and that of another point B on the same line as A nearer to the foot of the post is 25⁰. If A and B are 70m apart,
  (a) Draw a sketch to represent positions of A and B.
  (b) Using your sketch calculate
  (i) The height of the post from the ground level (Ans 1 d.p)
  (ii) The distance of point A from the foot of the post.

  Date posted: June 18, 2019 .    Answers (1)

• A regular polygon has its exterior angle 18⁰, and one of its sides 16cm. Calculate its area. (to 2 d.p) (Solved)
  

  A regular polygon has its exterior angle 18⁰, and one of its sides 16cm. Calculate its area.
  (to 2 d.p)

  Date posted: June 18, 2019 .    Answers (1)

• From a point 20m away on a level ground the angle of elevation to the lower window line is 27⁰ and the angle of elevation... (Solved)
  

  From a point 20m away on a level ground the angle of elevation to the lower window line is 27⁰ and the angle of elevation to the top line of the window is 32⁰. Calculate the height of the window.

  Date posted: June 18, 2019 .    Answers (1)

• The sides of a parallelogram are 4cm by 5cm and its area is 12cm². Calculate its angles. (Solved)
  

  The sides of a parallelogram are 4cm by 5cm and its area is 12cm². Calculate its angles.

  Date posted: June 18, 2019 .    Answers (1)

• The exterior angle of a regular polygon is an eighth of the interior angle. How many sides does the regular polygon have? (Solved)
  

  The exterior angle of a regular polygon is an eighth of the interior angle. How many sides does the regular polygon have?

  Date posted: June 18, 2019 .    Answers (1)

• In the figure below, lines AB and LM are parallel. Find the values of the angles marked x, y and z (Solved)
  

  In the figure below, lines AB and LM are parallel.
  
  Find the values of the angles marked x, y and z

  Date posted: June 18, 2019 .    Answers (1)

• The exterior angle of a regular polygon is equal to one-third of the interior angle. Calculate the number of sides of the polygon and give its... (Solved)
  

  The exterior angle of a regular polygon is equal to one-third of the interior angle.
  Calculate the number of sides of the polygon and give its name.

  Date posted: June 18, 2019 .    Answers (1)

• In the triangle XYZ below, find the angle ZXY. (Solved)
  

  In the triangle XYZ below, find the angle ZXY.
  

  Date posted: June 18, 2019 .    Answers (1)

• Wanjiku is standing at a point P, 160m south of a hill H on a level ground. From point P she observes the angle of elevation... (Solved)
  

  Wanjiku is standing at a point P, 160m south of a hill H on a level ground. From point P she observes
  the angle of elevation of the top of the hill to be 67⁰
  (a) Calculate the height of the hill
  (b) After walking 420m due east to the point Q, Wanjiku proceeds to point R due east of Q, where the
  angle of elevation of the top of the hill is 35⁰. Calculate the angle of elevation of the top of the hill
  from Q
  (c) Calculate the distance from P to R

  Date posted: June 18, 2019 .    Answers (1)

• The sum of angles of a triangle is given by the expression (2a+b)⁰ while that of a quadrilateral is given by (13a - b)⁰ . Calculate... (Solved)
  

  The sum of angles of a triangle is given by the expression (2a+b)⁰ while that of a quadrilateral is
  given by (13a - b)⁰ . Calculate the values of a and b

  Date posted: June 18, 2019 .    Answers (1)

• Simplify the expression:- (Solved)
  

  Simplify the expression:-
  

  Date posted: June 18, 2019 .    Answers (1)