Measuring Angles using Addition and Subtraction

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Presentation transcript:

Measuring Angles using Addition and Subtraction

Measuring Angles using addition Adding the two angles given to find the measurement of the acute angle. 56 + 23 = 79

Let’s Practice!! What do you recognize? Add both angles 77 + 80= 157

Try this one on your own!!

Did you get 60! Recognize you have both angles add 24 + 36 = 60

Measuring angles using Known angles Recognize that you don’t have all your angles. Right angle which means 90 degrees. Add 64 + 90 = 154

Measuring angles using subtraction Recognize that you have a missing angle. <ABD is 92. 92-37 = 55 Check work by adding 55 + 37 to get 92. <ABD = 92

Let’s Practice! <CBA= 45 22 What do you recognize? Missing an angle. Know <CBA is 45degrees. So subtract 45-22 = 23 22 <CBA= 45

Try this one on your own! <RSU = 70

Did you get 26! Recognize you have a missing angle. <RSU = 70 70- 44 = 26

Measuring angles using Known angles Recognize that you have all angles, but you should see that you have a straight angle. Straight angle which means 180 degrees. Subtract 180 – 62= 118