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Inessa [10]
3 years ago
11

what is the measure of the vertex angle of an isosceles triangle i’d one of its base angles measures 42°

Mathematics
1 answer:
Naya [18.7K]3 years ago
8 0

The measure of the vertex angle of the isosceles Δ is 96°

Step-by-step explanation:

In the isosceles triangle

  • Two sides are equal in lengths
  • The angle between the two equal sides is called vertex angle
  • The other two angles are called base angles
  • The base angles are equal in measure

∵ The measure of one of the base angles of an isosceles Δ = 42°

- The base angles are equal in measure

∴ The measure of the other base angle = 42°

∵ The sum of the measures of the interior angles of any Δ = 180°

∴ 42 + 42 + measure of the vertex angle = 180

∴ 84 + measure of the vertex angle = 180

- Subtract 84 from both sides

∴ measure of the vertex angle = 96°

The measure of the vertex angle of the isosceles Δ is 96°

Learn more:

You can learn more about the triangles in brainly.com/question/6530759

#LearnwithBrainly

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