Triangles

Can you guess what the equal angles are in a Right Isosceles triangle?

90 degrees for the right angle and then 45 degrees for the two remaining angles. This equals 180 degrees.

What is a triangle?

A triangle has three sides and three angles. The three angles always add to 180°. A triangle is a three sided polygon.

Draw a picture of an Acute Triangle and scalene.

Acute Triangle and scalene All angles are less than 90°. An acute triangle is a triangle having three acute angles.

What are the three types of angles in a triangle?

Acute Triangle, Right Triangle, Obtuse Triangle

Draw an acute and equilateral triangle.

Acute and equilateral triangle. The reference image summarizes all the possible types of triangles. Equilateral Triangle: Three equal sides. Three equal angles, always 60°. An equilateral triangle is a triangle having all three sides of equal length. Acute Triangle:All angles are less than 90°. An acute triangle is a triangle having three acute angles.

What is an Acute Triangle?

All angles are less than 90°. An acute triangle is a triangle having three acute angles.

What are the three types of triangles?

Equilateral Triangle, Isosceles Triangle, Scalene Triangle

What is a Right Triangle?

Has a right angle (90°). A right triangle is a triangle that has one 90 degree angle.

What is an Obtuse Triangle?

Has an angle more than 90°. An obtuse triangle is a triangle having one obtuse angle.

Describe a Scalene Triangle.

No equal sides. No equal angles. A scalene triangle is a triangle having three sides of different length.

Draw a picture of a Obtuse Triangle.

Obtuse Triangle Has an angle more than 90°. An obtuse triangle is a triangle having one obtuse angle.

You can combine triangles and angles to come up with new triangle names. Click for an example.

Right Isosceles Triangle has a right angle (90°) and also two equal angles.

Draw a right and scalene triangle.

Right and scalene triangle. Right Triangle: A right triangle is a triangle that has one 90 degree angle. Scalene Triangle: No equal sides. No equal angles. A scalene triangle is a triangle having three sides of different length.

How many types of triangles are there?

There are three basic types of triangles.

Describe an Equilateral Triangle.

Three equal sides. Three equal angles, always 60°. An equilateral triangle is a triangle having all three sides of equal length.

Describe an Isosceles Triangle.

Two equal sides. Two equal angles. An isosceles triangle is a triangle having two sides of equal length.

Draw an obtuse and isosceles triangle.

obtuse and isosceles Obutse Triangle: Has an angle more than 90°. An obtuse triangle is a triangle having one obtuse angle. Isosceles Triangle: Two equal sides. Two equal angles. An isosceles triangle is a triangle having two sides of equal length.