Question

Exercise 14.2
1. Calculate the perimeter of the triangles with the given sides ;
(a) 32 cm, 16 cm and 23 cm
(b) 13.5 cm, 11.5 cm and 9.5 cm
2. Calculate the perimeter of an equilateral triangle with each side :
(a) 15 cm
(b) 3.5 cm
(c) 450 cm
(d) 11.75 cm
3. Calculate the third side of the following triangles when the perimeter and two of the sides are
given
(a) P = 125 cm, 32 cm, 46 cm
(b) P = 76.5 cm, 23 cm, 29.5 cm
4. Find the circumference of the circle whose radius is :
(a) 14 cm
(b) 3.5 cm
(c) 35 m
(d) 10.5 dm
5. Find the radius of the circle whose circumference is :
(a) 44 cm
(b) 132 dm
(c) 110 dm
(d) 66 mm
of fencing it all around the boundary at the​

Answer 1

Step-by-step explanation:

Q1_

a) 71cm

b) 34.5 cm

Q2_

a) 45cm²

b) 10.5 cm²

c) this part is wrong

d) 35.25cm²

Q3_

a) 47cm

b) 24cm

Q4_

a) 88cm

b) 22 cm

c) 220cm

d) 66cm

Q5_

a) 7 cm

b) 21cm

c) 17.5 cm

d) 10.5 cm

Answer 2

calculate the perimeter of an equilateral triangle with each side:11.75cm