Triangles

This page has been designed for 7th to 8th grade students. A triangle is a three-sided figure that contrasts other triangles by the measure of their angles or the lengths of their sides. The table below shows examples of a brief description of each of the triangles. A scalene triangle is one of the easiest triangle's to draw. The main objective is to draw three sides that are not equal, and connect them. There is no special angle or measure of length for the sides. An isosceles triangle can either be a right, obtuse, or acute triangle with two sides of the same length, and can have any type of measure for their angles. An equilateral triangle must have all sides equal in length, and have all angles must be 60 degrees. An obtuse angle is any type of triangle, but at least one side must be greater than 90 degrees. There will be different variations of this type of triangle depending on the measure of its angle. A right triangle is a triangle which does not have to have equal sides, but has to have at least one angle equal to 90 degrees. Most of the right triangles will look the same; there will only be different sizes because of the lengths of each side. An acute triangle has no specific measure of length, but all the angles must measure less than 90 degrees. This is a basic overview on the types of triangles. At the end of the page there is a quiz on the types of triangles.

Types of Triangles

Scalene		Triangle with no sides of equal length.
Isosceles		Triangle with two sides of equal length.
Equilateral		Triangle with exactly three sides of equal length.
Obtuse Triangle		Triangle with one of the angles measuring more than 90 degrees.
Right Triangle		Triangle with one angle measuring 90 degrees.
Acute Triangle		Triangle with all angles measuring less than 90 degrees.

A definitions quiz on triangles.

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