5 Minute Check Solve. Complete in your notebook d = x = c = = 23
5 Minute Check Solve. Complete in your notebook d = 576
5 Minute Check Solve. Complete in your notebook d = d = 461
5 Minute Check Solve. Complete in your notebook. 2. x = 537
5 Minute Check Solve. Complete in your notebook. 2. x = x = 682
5 Minute Check Solve. Complete in your notebook c = 35
5 Minute Check Solve. Complete in your notebook c = c =
5 Minute Check Solve. Complete in your notebook. 4. = 23
5 Minute Check Solve. Complete in your notebook · = 23 · 35 t = 805
Thursday, Feb 27 Chapter13-1 Angles
Objective: To draw and label angles.
Angles Angles are measured in degrees. One degree is 1/360 of a circle. (Or there are 360 degrees in a circle).
Angles Angles have two sides that share a common endpoint called a vertex. vertex
Angles A right angle measures 90°. (Draw angle in notes.) Right angle symbol
Angles A straight angle measures 180°. (Draw angle in notes.)
Angles An obtuse angle measures between 90° and 180°. (Draw angle in notes.)
Angles An acute angle measures between 0°and 90°. (Draw angle in notes.)
Angles An angle of 89 ° is what type of angle?
Angles An angle of 89 ° is what type of angle? Since 89 ° is between 0 ° and 90 °, it is an acute angle.
Angles An angle of 90 ° is what type of angle?
Angles An angle of 90 ° is what type of angle? 90 ° is a right angle.
Angles An angle of 114 ° is what type of angle?
Angles An angle of 114 ° is what type of angle? Since 114 ° is between 90 ° and 180 °, it is an obtuse angle.
Angles Is this angle right, straight, obtuse or acute?
Angles Is this angle right, straight, obtuse or acute? Since the angle is less than 90°, it is acute.
Angles Is this angle right, straight, obtuse or acute?
Angles Is this angle right, straight, obtuse or acute? Since the angle is 180°, it is straight.
Angles Is this angle right, straight, obtuse or acute?
Angles Is this angle right, straight, obtuse or acute? Since the angle has the “right angle symbol”, it must be a right angle.
Angles Two angles are complementary if the sum of their angles is 90 °. Two angles are supplementary if the sum of their angles is 180 °.
Angles Angles A and B are complementary. If m A = 25 °, what is m B?
Angles Angles A and B are complementary. If m A = 25 °, what is m B? 90° - 25° = m B 65 ° = m B
Angles Angles M and N are supplementary. If m M = 85 °, what is the measure of N?
Angles Angles M and N are supplementary. If m M = 85 °, what is the measure of N? M + N = 180 ° 85 ° + N = 180 ° N = 95 °
Angles Angles C and D are complementary. If m C = 47 °, what is the measure of D?
Angles Angles C and D are complementary. If m C = 47 °, what is the measure of D? C + D = 90 ° 47 ° + D = 90 ° D = 43 °
Angles Angles A and B are supplementary. If m A = 127 °, what is the measure of B?
Angles Angles A and B are supplementary. If m A = 127 °, what is the measure of B? A + B = 180 ° 127 ° + B = 180 ° B = 53 °
Angles Angles F and G are supplementary. If m F = 12 °, what is the measure of G?
Angles Angles F and G are supplementary. If m F = 12 °, what is the measure of G? F + G = 180 ° 12 ° + G = 180 ° G = 168 °
Angles If there are 360˚ in a circle and 12 hours on a clock, how many degrees is one hour?
Angles If there are 360˚ in a circle and 12 hours on a clock, how many degrees is one hour? 360˚ ÷ 12 = 30˚
Angles What is the angle formed by the hands of the clock at 2:00?
Angles What is the angle formed by the hands of the clock at 2:00? 60˚ or 300˚
Angles What is the angle formed by the hands of the clock at 9:00?
Angles What is the angle formed by the hands of the clock at 9:00? 90˚or 270 ˚
Angles What is the angle formed by the hands of the clock at 6:00?
Angles What is the angle formed by the hands of the clock at 6:00? 180 ˚
Angles Angles around a point will always add to 360˚.
Angles What is the unknown angle?
Angles What is the unknown angle? = 298, 360 – 298 = 62˚
Angles What is the unknown angle?
Angles What is the unknown angle? = 276, 360 – 276 = 84˚
Angles What is the unknown angle?
Angles What is the unknown angle? = 257, 360 – 257 = 103˚
Angles What is “x”?
Angles What is “x”? x + 2x + 3x + 4x +5x = 15x, 15x =360
Angles What is “x”? x + 2x + 3x + 4x +5x = 15x, 15x =360 15x = x = 24
Angles What did the acorn say when he grew up?
Angles What did the acorn say when he grew up? Answer: Geometry (Gee, I'm a tree!)
Angles Agenda Notes – Homework – Study Guide13-1 Due Friday, Feb 28 Just classify the angle, do not measure with a protractor. Mid-Chapter 13 Quiz Monday, March 3