The trapezium

The trapezium is formed by cutting the top of the right-angled isosceles triangle. The base of the trapezium is 10 cm and the top is 5 cm. Find the area of trapezium.

Correct answer:

A =  18.75 cm2

Step-by-step explanation:

b1=10 cm b2=5 cm  a12+a12=b12 a22+a22=b22  a1=b1/2=10/2=5 2 cm7.0711 cm  a2=b2/2=5/23.5355 cm  A1=2a12=27.07112=25 cm2 A2=2a22=23.53552=425=6.25 cm2  A=A1A2=256.25=475 cm2=18.75 cm2



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Pythagorean theorem is the base for the right triangle calculator.
See also our trigonometric triangle calculator.

 
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