Well, in order for a shape to be a triangle, it can only have one right angle. Therefore, it is called a right triangle.
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A right-angled triangle can be an Isosceles Triangle, but NOT an equilateral triangle. An Isosceles triangle has two sides of equal length. They form the 90 degree (right angle). The hypotenuse is opposite the right angle, and is longer than the other two sides.
yes if it is a square. squares are rectangles with their 4 sides and 4 right angles, but rectangles are not squares without 4 equal sides
Yes they do for a triangle using Pythagorean theorem 5 squared + 12 squared = 13 squared
No. In order for three angles to form a triangle, they must collectively add up to 180 degrees (or pi radians).
Triangles are either accute, obtuse, or right. To draw an accute triangle start by drawing an accute angle (less than 90 degrees). Then extend the ends of the angle and connect them making sure that both new angles are also acute. To draw a right triange first draw a right angle. Then extend the angle and connect to form two accute angles. To draw an obtuse triangle first draw an obtuse angle (greater than 90 degrees). Then extend the sides of the angle and connect creating 2 accute angles.