Question

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A right-angled triangle has two equal sides.
Write the sizes of the angles in this triangle.

Answer 1

the angles of a triangle add up to 180°. a right triangle has one 90° angle. using the base angle theorem from geometry, which says that the two base angles of an isosceles triangle are congruent/equal, you know that the non right angles are equal to one another. 180-90 is 90, so the other two angles are 90=2x. the other two angles are 45°. the measures of the angles are 90°,45°,45°