Math Problem Statement

Label the figure and fill in the table with all angle measures. Given that AB is parallel to DEF, AE and BD intersect at C, angle B is 52°, and angle CEF is 150°.

Solution

Let's analyze the information in this problem.

Given Information:

  1. AB is parallel to DEF: This suggests that we may need to use the concept of alternate interior angles.
  2. Segments AE and BD intersect at C.
  3. Angle B is 52°.
  4. Angle CEF is 150°.

Objective:

We need to fill in the missing angles in the table. Let's go through each angle step by step.

Analyzing Each Angle:

  1. Angle A: Since ABDEFAB \parallel DEF and AEAE crosses both lines, angle AA should be an alternate interior angle with angle CEFCEF, which measures 150°. Therefore, Angle A = 150°.

  2. Angle B: This angle is given as 52°.

  3. Angle BCA: This is the angle at point CC formed by lines BCBC and CACA. Since it forms part of the triangle ABCABC, we can use the interior angle sum property of triangles. The sum of angles in ABC\triangle ABC is 180°, so: Angle A+Angle B+Angle BCA=180°\text{Angle A} + \text{Angle B} + \text{Angle BCA} = 180° 150°+52°+Angle BCA=180°150° + 52° + \text{Angle BCA} = 180° Solving for Angle BCA\text{Angle BCA}: Angle BCA=180°150°52°=22°\text{Angle BCA} = 180° - 150° - 52° = -22°

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Math Problem Analysis

Mathematical Concepts

Geometry
Parallel Lines
Angle Relationships
Alternate Interior Angles

Formulas

Sum of angles in a triangle is 180°

Theorems

Interior Angle Theorem
Alternate Interior Angles Theorem

Suitable Grade Level

Grades 7-10