An umbrella is made by stitching ten triangular pieces of cloth each measuring 60cm ,60cm and 20cm .find the area of the cloth required for the umbrella.

ITS IN FORM OF ISOCELENT TRIANGLE
so
2 sides which are equal measures=60 m
1 side is = 20 m
so area =
60 +60/2=60 
whole root 60 (60-60) (60 - 60) ( 60 - 20 )= 60 * 40= 2400cm2

huerons formula

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