How Do You Use Complementary Angles to Find a Missing Angle?

How Do You Use Complementary Angles to Find a Missing Angle?

Note:

If two angles are complementary, that means that they add up to 90 degrees. This is very useful knowledge if you have a figure with complementary angles and you know the measurement of one of those angles. In this tutorial, see how to use what you know about complementary angles to find a missing angle measurement!

Keywords:

  • problem
  • angle
  • angles
  • complementary
  • complementary angles
  • perpendicular
  • perpendicular lines
  • right
  • right angle
  • 90 degrees
  • 90 degree angle
  • find angle
  • find missing angle

Background Tutorials

  • Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

      • What is an Angle?What is an Angle?

      What is an Angle?

      Angles are a fundamental building block for creating all sorts of shapes! In this tutorial, learn about how an angle is formed, how to name an angle, and how an angle is measured. Take a look!

  • Solve real-world and mathematical problems by writing and solving equations of the form x + p = q and px = q for cases in which p, q and x are all nonnegative rational numbers.

      • How Do You Solve a Decimal Equation Using Subtraction?How Do You Solve a Decimal Equation Using Subtraction?

      How Do You Solve a Decimal Equation Using Subtraction?

      Want to see how to solve an equation containing decimals? Then check out this tutorial! You'll see how to subtract decimals in order to solve an equation for a variable. Then, see how to check your answer so you can be certain it's correct!

  • Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve simple equations for an unknown angle in a figure.

      • What are Complementary Angles?What are Complementary Angles?

      What are Complementary Angles?

      Do complementary angles always have something nice to say? Maybe. One thing complementary angles always do is add up to 90 degrees. In this tutorial, learn about complementary angles and see how to use this knowledge to solve a problem involving these special types of angles!

Further Exploration

  • Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve simple equations for an unknown angle in a figure.

      • How Do You Use Supplementary Angles to Find a Missing Angle?How Do You Use Supplementary Angles to Find a Missing Angle?

      How Do You Use Supplementary Angles to Find a Missing Angle?

      If angles combine to form a straight angle, then those angles are called supplementary. In this tutorial, you'll see how to use your knowledge of supplementary angles to set up an equation and solve for a missing angle measurement. Take a look!