How to get an area for this shape

A = 135 cm²

Step-by-step 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

3,000,540

step-by-step explanation:

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225