In ABC, AB=AC=10cm. <B=50°.
a) What is the measure of <A?
b) What is the perpendicular distance from C to AB?
c) What is the area of ABC?
( sin80 = 0.98 , cos80=0.17 , sin50 = 0.77, cos50 = 0.64 )
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Answer :
< A = 80⁰
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