Answer:
21 cm²
Step-by-step explanation:
Area of a trapezium is given by the formula
[tex]A = \dfrac{a + b}{2}\cdot h[/tex]
where
a and b are two opposite parallel sides and
h is the vertical height(distance between these two sides)
Measurements in the image are in cm with each square grid being 1 cm x 1 cm
Looking at the graph we see
top side (call it a) = 5 cm
bottom side(call it b) = 9 cm
h = 3 cm
[tex]Area \; A = \dfrac{5 + 9}{2} \cdot 3\\\\A = \dfrac{14}{2} \cdot 3\\\\A = 7 \cdot 3\\\\A =21 \text{ square cm}[/tex]
Answer:
Area = 21 cm²