Answer:
The answer is b = 6
Step-by-step explanation:
Area of a triangle= 1/2 × b × h
A = 21, h = 7, b = ?
21 = 1/2 × b × 7 (multiplying through)
21 = 7b/2
Cross multiply
2 × 21 = 7b
42 = 7b
b = 42/7
b = 6
Answer:
b = 6ft
Step-by-step explanation:
Area of a triangle = 1/2 x base x height
Given the area = 21ft^2
Height = 7ft
Base = ?
Using the above formula
21 = 1/2 x b x 7
21 = 7b/2
Cross multiply
7b = 21 x 2
7b = 42
Divide both sides by 7
7b/7 = 42/7
b = 6ft
The length of the base is 6ft
