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Mathematics 12 Online
OpenStudy (12g):

plz help me with my math

OpenStudy (anonymous):

Whats your question?

OpenStudy (12g):

Word Bank: Angle 6 = Angle 8 Angle 4 = Angle 6 Angle 4 = Angle 8 Vertical Angles Theorem Alternate Interior Angles Theorem Transitive Property 2. Fill in the missing blanks below to prove that the Sum of the measures of the interior angles of a triangle is 180°. Let ABC be any triangle. Draw line DE, which passes through point A, parallel to __________ with a compass and straightedge. According to the Angle Addition Postulate ∡DAB + ∡CAB + ∡CAE = ∡DAE. ∡CAE is congruent to ∡BCA by______________________. ∡DAB is congruent to ____________ by the same theorem. Substitution allows me to replace ∡CAE with ∡BCA and ∡DAB with ∡ABC in the equation. Therefore, __________________________= ∡DAE. By definition of a straight angle, ∡DAE measures ____________. Consequently, the three angles of ABC (BCA, CAB, and ABC) measure 180° by ___________.

OpenStudy (12g):

i missed out on the whole lesson

OpenStudy (12g):

im so confussed

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