Step-by-step explanation:
Area of a trapezium = ¹/₂ (a + b) h
But the height isn't given. So we have to solve for it.
h = √(10² - 6²) [using the Pythagorean theorem]
= 8
∴ Area of the shape = ¹/₂ (13 + 28) 8
= 164 u²
