91. The base of an isosceles triangle is 48 cm and its perimeter is 108 cm. Find the area of the triangle?
Answers
Answered by
8
Step-by-step explanation:
Isosceles triangle
Solve for area
A=432cm²
Answered by
10
Answer:
Let AB=AC=0
⇒2a+48=108
⇒2a=60+a=30
Perpendicular AD to BC also bisect BC(Isosceles triangle prop)
⇒BD=24cm By Pythagoras theorem,
AD2=a2−242=900−576=324
⇒AD=18cm
area of triangle =21×Base×Height=21×48×18=432cm²
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