Q57 of 158 Page 159

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If one angle of a triangle is equal to the sum of other two, then the measure of that angle is ________.

90°

When one angle is equal to sum of other two

Means 2 quantities are equal

If by angle sum property all angles sum is 180°

∴ 2 quantities can only be equal if they get halved

Hence; angle = = 90°

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In an isosceles triangle, two angles are always ________.

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In an isosceles triangle, angles opposite to equal sides are ________.

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Every triangle has at least ________ acute angle (s).

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Two line segments are congruent, if they are of ________ lengths.

Fill in the blanks to make the statements true.If one angle of a triangle is equal to the sum of other two, then the measure of that angle is ________.