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Monica [59]
2 years ago
8

A triangle has two equal sides.

Mathematics
1 answer:
Naddik [55]2 years ago
4 0

Answer:

a) isoceles

b) 40°

Step-by-step explanation:

a) an isoceles triangle has 2 sides of equal length

b) Two interior angles of an isoceles triangle are equal.

Also, the sum of the interiors angles of any triangle = 180°

We are told that one of the angles measures 100°.  This angle <u>cannot</u> be one of the 2 equal angles, as 2 x 100° = 200° which is greater than the sum of all three angles.

Therefore, the sum of the 2 equal angles must be 180 - 100 = 80

Therefore, the size of one of them = 80 ÷ 2 = 40°

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Answer:

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Step-by-step explanation:

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