A right triangle is a triangle in which one angle is a right angle. The relation between the sides and angles of a right triangle is the basis for trigonometry. For practice on this and more, take this quiz.
Questions: 9  Attempts: 723  Last updated: Nov 9, 2017

Sample Question
For the right triangle ABC shown below, what is tanA?
Students will test their knowledge on 306090 and 454590 triangles.
Questions: 5  Attempts: 576  Last updated: May 1, 2017
Pythagorean Theorem and its converse; Special Right Triangles; Trigonometry
Questions: 15  Attempts: 355  Last updated: Jan 24, 2013

Sample Question
Rita drew right triangle GHK on a sheet of notebook paper.
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GH = 3 cm (LL)
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GH = 5 cm (Hypotenuse)
To the nearest centimeter, what is the perimeter of the triangle?