find the area of a triangle whose height is 10 cm and base is 9 CM also find third side of the triangle if its another side is 12 cm and the perimeter is 36 CM
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Answer:area of triangle = 45 sq. cm
third side = 15 cm
Step-by-step explanation: Area of triangle = 1/2×base ×height
= 1/2 × 9 × 10
= 45 sq. cm.
perimeter of triangle = sum of all sides
36 cm = 9 + 12 + third side
36 - 21 = third side
∴ third side of triangle = 15 cm.
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