Maths-
General
Easy
Question
Find the area of a given triangle whose perimeter is equal to 26cm .10 cm
- 20 sq cm
- 20.5 sq cm
- 21 sq cm
- 22 sq cm
The correct answer is: 20 sq cm
Perimeter = 26cm
Height = 10cm
Hypotenuse = 12cm
Area = ?
Perimeter of triangle = sum of sides
26 = 10 + 12 + b
26 = 22 + b
26 - 22 = b
4cm = b
Area = 
× base × height
= × 4 × 10= 20 sq. cm
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