angle review. angles with the same measure are congruent. if m 1 = m 2, then 1 2 congruent “...

Angle Review

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Angle Review

Angles with the same measure are congruent.

If m1 = m2, then 1 2

Congruent

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Vertical Angles

• Vertical angles are two nonadjacent angles formed by two intersecting lines

• Vertical angles are ALWAYS congruent

Angles 1 and 3 are vertical;Angles 2 and 4 are vertical.

Page 4: Angle Review. Angles with the same measure are congruent. If m 1 = m 2, then 1 2 Congruent “ curtains ”

Complementary Angles

• Complementary angles are 2 angles whose measures have a sum of 90 degrees

• Complementary angles can be adjacent or nonadjacent

200

700

Page 5: Angle Review. Angles with the same measure are congruent. If m 1 = m 2, then 1 2 Congruent “ curtains ”

Supplementary Angles

• Supplementary angles are 2 angles whose measures have a sum of 180 degrees.

• Supplementary angles can be adjacent or nonadjacent.

520 1280

Angles

• “small” angles are equal

• “big” angles are equal

• One big and one small equal 180

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Page 7: Angle Review. Angles with the same measure are congruent. If m 1 = m 2, then 1 2 Congruent “ curtains ”

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Theorem 12-4: In the same circle (or congruent circles), congruent central angles create congruent intercepted arcs. then AB CD. If m CQD m BQA,

leearlington.weebly.com · CPCTC which stands for "Congruent Parts of Congruent Triangles are Congruent," to prove that certain parts of triangles are congruent. Ex. c 2.9 4.5 686

Congruent triangles have congruent The parts of congruent ......pictures of triangles. You are to determine if the triangles are congruent. If they are congruent, then you should write

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Chapter 2 8 Outline.doc · Web viewParallelograms * A B C D M Parallelogram Characteristics Opposite Sides Congruent Opposite Angles Congruent Consecutive ’s Supplementary Diagonal

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