Therefore, the congruent side is equal to 5 units. Isosceles triangles have equal legs (thats what the word 'isosceles' means). Where, x is equal to the length of the congruent side and h is the measure of the hypotenuse. Base angles of an isosceles triangle are congruent. We know that the formula to calculate the perimeter of an isosceles right triangle is: $(2x h)$ units. Plan for Proof Plan in Action legs, or corresponding parts of congruent triangles are congruent. Thus, the interior angles of an isosceles right triangle are $90^$ units then, find the measure of the congruent sides. Therefore, in an isosceles right triangle, two sides and the two acute angles are equal. Since the two sides of the right triangle are equal in measure, the corresponding angles are also equal. Isosceles Right Triangle: DefinitionĪn isosceles right triangle is a type of right triangle whose legs (base and height) are equal in length. When you combine these two properties together, you get an isosceles right triangle. It is also known by the name of right-angled isosceles triangle or a right isosceles triangle. The two equal sides of an isosceles triangle are called the legs and the unequal side is called the base. It is a type of special isosceles triangle where one interior angle is a right angle and the remaining two angles are thus congruent since the angles opposite to the equal sides are equal.
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