find the Area of a triangle two sides of which are 15cm and 28cm and the perimeter is 84cm
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Answer:Let x=the length of the third (non-congruent) side.
x + 3x = 35
4x = 35
x = 35/4. the other sides are (35-35/4)/2 = (105/8)
Step-by-step explanation:
Answered by
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To find the third side, let us take third side = x.
84cm =15cm + 28cm + x
84cm = 43cm + x
84cm - 43cm = x
41 cm = x
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Area of a triangle when its all the sides are
given is :
Where, Semiperimeter is calculated by:
Using these formulae,
Semiperimeter in this case ;
Area of the triangle :
Bhavyanayak:
✓3969 is 63 that means, the final answer is 63 × 2 = 126 square cm
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