Mathematics
Grade 8
15 min
Exterior Angle Theorem
Exterior Angle Theorem
What you'll learn
- Substitute given decimal, fraction, and mixed number values for variables in algebraic expressions with at least 80% accuracy.
- Solve variable expressions involving decimals, fractions, and mixed numbers using the order of operations, demonstrating correct steps in at least 4 out of 5 problems.
- Explain, in their own words, the process of evaluating a variable expression with decimals, fractions, or mixed numbers, including the importance of the order of operations.
- Identify and correct errors in pre-solved variable expression problems involving decimals, fractions, and mixed numbers, justifying the corrections with mathematical reasoning in at least 3 out of 4 cases.
Tutorial Preview
1
Find the exterior angle when you know the two remote interior angles.
2
Find an interior angle when you know the exterior angle.
3
Use the theorem to set up and solve an equation for x.
Sample Practice Questions
Easy
The two remote interior angles of a triangle are 30° and 40°. What is the measure of the exterior angle?
0.70°
1.110°
2.10°
3.180°
Easy
Two inside angles are 20° and 50°. Find the outside angle.
0.30°
1.70°
2.110°
3.130°
Easy
An exterior angle is 80°. One remote interior angle is 40°. What is the other remote interior angle?
0.40°
1.120°
2.80°
3.50°
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Frequently asked questions
What grade level is "Exterior Angle Theorem"?
Exterior Angle Theorem is a Grade 8 Mathematics lesson on ExcelOS.
What will I learn in Exterior Angle Theorem?
You'll be able to: Substitute given decimal, fraction, and mixed number values for variables in algebraic expressions with at least 80% accuracy; Solve variable expressions involving decimals, fractions, and mixed numbers using the order of….
Is "Exterior Angle Theorem" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Exterior Angle Theorem?
This lesson includes 25 practice questions across multiple difficulty levels, each with instant feedback and explanations.