7.G.5 ~ Find measures of angles formed by intersecting lines.

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Presentation transcript:

7.G.5 ~ Find measures of angles formed by intersecting lines

When two lines intersect, they form a 360º angle, or a circle.

Half of a circle is a straight line, or 180º.

When two lines intersect, they form two pairs of opposite angles, A + C and B + D. Another word for opposite angles are vertical angles. Vertical angles are always EQUAL!

Adjacent angles are angles that come out of the same vertex. Adjacent angles share a common ray and do not overlap.

Two angles are said to be complementary when the sum of the two angles is 90°.

Two angles are said to be supplementary when the sum of the two angles is 180°, or form a straight line.

Find the value of x. Then find the value of each angle. 56° 84°

Find the value of y. y = 9

Find the value of x. Then find the value of each angle. X=30 33° 57°

Find the value of x. Then find the value of each angle. X = 17 67° 113°

Find the missing angles: 40° 58° 90° 50°

Now, let’s do some practice with angles!