Math Problem Statement

Calculate the unknown angles in each of the following, giving reasons for all your statements.

Solution

Let's solve the unknown angles in each diagram step by step. I'll refer to the diagrams in the image based on their position (from top to bottom and left to right).

1. Top Left Diagram:

  • Given: One angle is marked as 4747^\circ.
  • Solution: This is a right-angled triangle, so the other angle on the same straight line is 18047=133180^\circ - 47^\circ = 133^\circ.

2. Top Right Diagram:

  • Given: The diagram shows two intersecting lines.
  • Solution: The angle across from the one marked 6767^\circ will also be 6767^\circ because vertically opposite angles are equal.

3. Middle Left Diagram:

  • Given: Two angles are vertically opposite, one marked as 5858^\circ.
  • Solution: The other angle will also be 5858^\circ since vertically opposite angles are equal.

4. Middle Right Diagram:

  • Given: An angle of 3737^\circ is marked.
  • Solution: The angle adjacent on the straight line will be 18037=143180^\circ - 37^\circ = 143^\circ.

5. Bottom Left Diagram:

  • Given: There are two angles on a straight line, with one marked 114114^\circ.
  • Solution: The unknown angle is 180114=66180^\circ - 114^\circ = 66^\circ.

6. Bottom Right Diagram:

  • Given: Two angles on a straight line, with one marked 146146^\circ.
  • Solution: The other angle is 180146=34180^\circ - 146^\circ = 34^\circ.

Summary of Solutions:

  1. 133133^\circ (Right angle)
  2. 6767^\circ (Vertically opposite)
  3. 5858^\circ (Vertically opposite)
  4. 143143^\circ (Straight angle)
  5. 6666^\circ (Straight angle)
  6. 3434^\circ (Straight angle)

Would you like more details on any of these solutions?

Here are some related questions:

  1. How do you calculate vertically opposite angles?
  2. Why do angles on a straight line sum up to 180180^\circ?
  3. What are supplementary angles?
  4. Can you find the value of unknown angles in a triangle?
  5. What is the significance of complementary angles?
  6. How can you find angles using the sum of interior angles of a polygon?
  7. What are corresponding angles and how are they calculated?
  8. How do you determine alternate interior angles?

Tip: Always remember that the angles on a straight line add up to 180180^\circ, and vertically opposite angles are always equal!

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Math Problem Analysis

Mathematical Concepts

Geometry
Angles
Geometric Properties

Formulas

-

Theorems

Vertical Angles Theorem
Straight Angle Theorem

Suitable Grade Level

Grades 7-9