7. Calculate the area of the quadrilateral ABCD from the measure-
ments given in figure.
[Hint : Join A to C, then find the area of triangles ABC and ACD]
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Step-by-step explanation:
angle AbC is 90 therefore by Pythagoras theorem
Ac²=AB²+BC²
AC²=15²+ 8²
AC²=225+64= 289
therefore AC²= 17
AREA af a triangle.= 1/2 × base × height
= 1/2 × AB × AC
= 15×4
= 60
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