the perimeter of a triangle is 22 cm if its two sides measure 9cm and 6cm find the length of the third side
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perimeter of triangle=sum of all sides, so
Let the unknown side be x
22 = 9 + 6 + x
22 = 15 + x
22-15=x
7=x
x=7
so the third side is 7 cm
Let the unknown side be x
22 = 9 + 6 + x
22 = 15 + x
22-15=x
7=x
x=7
so the third side is 7 cm
Answered by
1
Answer:
Step-by-step explanation:
Perimeter of triangle = 22cm
1st side = 9cm
2nd side = 6cm
3rd side = ?
#perimeter = 1st side + 2nd side + 3rd side
22 = 9 + 6 + 3rd side
22 = 15 + 3rd side
22 - 15 = 3rd side
7cm = 3rd side
therefore the length of third side is 7cm
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