Question

3) Calculate the area of this trapezium

D
A
11 cm
¹9 cm
19 cm
B
10 cm
C

Answer 1

A = 135 cm²

Explanation:

the area (A) of a trapezium is calculated as

A =
`(1)/(2)` h (b₁ + b₂ )

where h is the perpendicular height between the bases b₁ and b₂

here h = 9 , b₁ = 19 , b₂ = 11 , then

A =
`(1)/(2)` × 9 × (19 + 11) = 4.5 × 30 = 135 cm²