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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Tips to related online calculators
Pythagorean theorem is the base for the right triangle calculator.
See also our trigonometric triangle calculator.

We encourage you to watch this tutorial video on this math problem: video1   video2

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