(1) Some isosceles triangles are drawn below. In each, one angle is given Find the other angles. 40° 30°​

Question

(1) Some isosceles triangles are drawn below. In each, one angle is given
Find the other angles.
40°
30°​

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Isabelle 4 days 2021-10-10T06:43:16+00:00 1 Answer 0 views 0

Answers ( )

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    2021-10-10T06:44:49+00:00

    in the first triangle where the given side is 40°

    as the following triangle is an isosceles triangle so the two sides must be equal.so two sides will have 40° angle.

    let the other angle be

    we know that ,

    the interior angle of a triangle = 180°

    or,40°+40°+x°=180°

    or,80°+x°=180°

    or,x°=180°-80°

    or,x°=100°

    in the second triangle where the given side is 30°

    as the following triangle is an isosceles triangle so the two sides must be equal.so two sides will have 30° angle.

    let the other angle be X°

    we know that,

    the interior angle of a triangle = 180°

    or,30°+30°+x°=180°

    or,60°+x°=180°

    or,x°=180°-60°

    or,x°=120°

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