<P> A right triangle ( American English ) or right - angled triangle ( British English ) is a triangle in which one angle is a right angle ( that is , a 90 - degree angle ) . The relation between the sides and angles of a right triangle is the basis for trigonometry . </P>
<P> A right triangle ( American English ) or right - angled triangle ( British English ) is a triangle in which one angle is a right angle ( that is , a 90 - degree angle ) . The relation between the sides and angles of a right triangle is the basis for trigonometry . </P>
what kind of triangle has a 90 degree angle
what kind of triangle has a 90 degree angle
A right triangle
A right triangle