Isosceles Triangle Theorem Worksheet
Explore the properties of isosceles triangles, including angles and side lengths, with this Grade 6 math worksheet.
Includes
Standards
Topics
Isosceles Triangle Theorem
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all your work for full credit.
An isosceles triangle is a triangle that has at least two sides of equal length. The angles opposite these equal sides are also equal. These are called base angles.
1. Which of the following statements is true about an isosceles triangle?
All sides are equal.
All angles are 60 degrees.
At least two sides are equal.
No sides are equal.
2. In an isosceles triangle, the two angles opposite the equal sides are called the angles.
3. If an isosceles triangle has two sides of length 7 cm, then the angles opposite those sides are .
4. Look at the triangle below. If angle A is 70 degrees and side AB is equal to side AC, what are the measures of angle B and angle C?
5. All equilateral triangles are also isosceles triangles.
True
False
6. An isosceles triangle can have three different side lengths.
True
False
7. An isosceles triangle has one angle measuring 100 degrees. What are the measures of the other two angles?
Related Worksheets
Angle Identification Worksheet
Identify and classify different types of angles, including acute, obtuse, right, and straight angles.
Introduction to Fractals
Explore the fascinating world of fractals, self-similar geometric shapes, with this engaging Grade 6 math worksheet.
Introduction to Fractals
Explore the fascinating world of fractals, self-similar geometric shapes, with this engaging Grade 6 math worksheet.
Lateral Area Practice
This worksheet provides practice problems on calculating the lateral area of various three-dimensional shapes, suitable for 6th-grade math students.
Area Formulas Worksheet
A Grade 6 math worksheet covering the area formulas for rectangles, triangles, and parallelograms with practice problems.
Slicing 3D Figures Worksheet
Explore how different 3D figures can be sliced to reveal 2D cross-sections.
Intersecting Chords Worksheet
Practice problems for understanding and applying the intersecting chords theorem in circles.
Altitude of a Triangle Worksheet
Explore the concept of altitude in different types of triangles, including right, acute, and obtuse triangles, with this Grade 6 math worksheet.