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katovenus [111]
3 years ago
8

Using a straightedge draw a random triangle now carefully cut it out next amputate the angles by snipping through adjacents side

s now move the angles together so the vertices all touch

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
4 0
This is usually used as a proof that triangles have 180°.  Look at the attached figures.  If you cut off angle A, angle B and angle C and rotate them so that their vertices touch, you form a half-circle out of them (or a straight line).  We know that half a circle is 1/2 of 360° or 180; therefore all 3 angles in a triangle must add up to 180°.

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Step-by-step explanation:

5 0
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kolbaska11 [484]

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Given the angles ∠ABF=8s-6, ∠ABE = 2(s + 11), we are to find the angle ∠EBF. The following expression is true for the three angles;

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Substituting the given angles into the equation to get the unknown;

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open the parenthesis

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collect the like terms

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factor out the common multiple

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<em></em>

<em>Hence the measure of angle ∠EBF is 2(3s-14)</em>

8 0
3 years ago
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3 years ago
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