Math Problem Statement

  1. The sum of the measures of two complementary angles is 90° . If one angle measures 15° more than twice the measure of its complement, find the measure of each angle

Solution

Let's define the angles in terms of a variable.

Let:

  • xx = the measure of one angle.
  • 90x90^\circ - x = the measure of its complement (since complementary angles sum up to 9090^\circ).

According to the problem, one angle is 15° more than twice the measure of its complement. This gives the equation:

x=2(90x)+15x = 2(90^\circ - x) + 15^\circ

Step-by-step solution:

  1. Expand the equation: x=1802x+15x = 180^\circ - 2x + 15^\circ x=1952xx = 195^\circ - 2x

  2. Add 2x2x to both sides to move all xx-terms to one side: x+2x=195x + 2x = 195^\circ 3x=1953x = 195^\circ

  3. Solve for xx: x=1953=65x = \frac{195^\circ}{3} = 65^\circ

Thus, the first angle measures 6565^\circ.

  1. To find the complement, subtract 6565^\circ from 9090^\circ: 9065=2590^\circ - 65^\circ = 25^\circ

Final Answer:

  • The first angle is 6565^\circ.
  • The complement is 2525^\circ.

Would you like further details or have any questions?

Here are 5 related questions:

  1. What are supplementary angles and how do they differ from complementary angles?
  2. How would you solve this problem if the condition involved supplementary angles?
  3. Can you express complementary angles using different algebraic equations?
  4. How can we verify the solution of this complementary angle problem?
  5. What are the applications of complementary angles in geometry?

Tip: Always verify your solution by plugging the angles back into the original conditions to ensure they satisfy all given relations.

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Math Problem Analysis

Mathematical Concepts

Complementary Angles
Linear Equations
Algebra

Formulas

x + (90° - x) = 90°
x = 2(90° - x) + 15°

Theorems

Complementary Angle Theorem

Suitable Grade Level

Grades 6-8