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10. A shape is made of 5 right triangles of equal size. Each triangle has a base of 7 cm and a height of 4 cm. What is the total area, in square centimeters, of the shape? A. 11 B. 16 C. 70 D. 140​
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Option C - 70 cm²

Step-by-step explanation:

Area of a right angle triangle is given by the formula :

A = 1/2×h×b

A = 1/2×7×4

A = 1/2×28

A = 14

This is the area of 1 right angle triangle. The area of 5 will be

14×5 = 70

Units will be cm²

Hope this helped and have a good day
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