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bearhunter [10]
3 years ago
8

An isosceles triangle has base 56 mm and

Mathematics
1 answer:
katrin2010 [14]3 years ago
8 0

Answer:

Step-by-step explanation:

Draw the altitude from the vertex angle to the base. You have two congruent, right triangles. The hypotenuse of each triangle is

√[(56/2)²+45²] = √[28²+45²] = √2809 = 53 mm

perimeter of larger triangle = 2×53 + 56 = 162 mm

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