1.

The parallel sides of a trapezium are 20 cm and 10 cm. Its nonparallel sides are both equal,each being 13 cm. Find the area of the trapezium.​

Answer»

Answer:

We divide the trapezium into 3 parts: 2 triangles and a rectangle.

Base of TRIANGLE =

2

20−10

=5

HEIGHT of the triangle and rectangle (h)

2

=13

2

−5

2

⇒(h)

2

=144

⇒h=12

Area of trapezium =

2

1

×(sum of PARALLEL sides) × (height)

=

2

1

×(10+20)×(12)

=180 sq.cm



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