Answer:
A = 135 cm²
Explanation:
The figure is composed of 2 triangles.
The area (A) of a triangle is calculated as
A =
bh ( b is the base and h the perpendicular height )
The total area is the sum of the area of both triangles
A =
× 18 × 7 +
× 18 × 8
= 9 × 7 + 9 × 8
= 63 + 72
= 135 cm²