SOLUTION: one of the equal angles of an isosceles triangle is 35 degree. If the base measures 20 cm, find the perimeter and the area of the triangle.
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Question 890405: one of the equal angles of an isosceles triangle is 35 degree. If the base measures 20 cm, find the perimeter and the area of the triangle. Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! one of the equal angles of an isosceles triangle is 35 degree. If the base measures 20 cm, find the perimeter and the area of the triangle.
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let x=length of each equal side
let h=height of triangle
cos 35˚=10/x
x=10/cos 35˚≈8.19
perimeter=2*8.19+20≈36.38 cm
..
tan 55˚=10/h
h=10/tan 55˚=7.00
Area=1/2*base*height=1/2*20*7.00≈70 cm^2
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