Answer:
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Step-by-step explanation:
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
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Exact form - -4/3
decimal form - -1.3 repeating
mixed number - -1 1/3
Answer:12x-15
Step-by-step explanation:2x+5(2x-3)
2x+10x-15
12x-15
The area is 3.2
The scale factor is 2/5
We know that the length is 4 so 4x2/5=8/5
8/5x2=16/5. 16/5=3.2
