1. Finding missing side
-triangle

2. Example 1:
Find the base of the triangle whose area and height are given below
area = 35 m2 , height = 5 m
Solution:
Given: Area = 35 m2 and Height = 5 cm; To find: Base
Area of a triangle =
35 m2 =
x b x = m2
b x 5 = 35 x (Multiply the denominator 2 to RHS)
b x 5 = 70
b = (Divide 5 to LHS)
x b x h
x b x 5
= 14
Ans: Base = 14 m

3. Ans: Height = 20 m Example 2:
Find the height of the triangle whose area and base are given below
area = 40 m2 , base = 4 m
Solution:
Given: Area = 40 m2 and Base = 4 cm; To find: Height
Area of a triangle =
40 m2 =
x 4 x h = 40 m2
2 x h = 40
h = (Transpose 2 to R.H.S)
h = 20
x b x h
x 4 x h
Ans: Height = 20 m

4. Try these
1. Find the base of a triangle whose area = 39m2 and height = 12m
2. Find the height of a triangle whose area = 25cm2 and base = 10cm