The given angles are consecutive interior angles in parallel lines. This question hasn't been answered yet Ask an expert. 13) Given that a//b, solve for x. +60 + 70 = +130. So [5x + 60] +  = 180. Previous question Next question Transcribed Image Text from this Question. Question: In The Figure, 21 And 22 Are Congruent Consecutive Interior Angles Alternate Interior Angles Alternate Extorior Angles. then each pair of consecutive interior angles is supplementary. Corresponding angles are congruent, alternate interior angles are congruent, same side or consecutive interior angles are supplementary, alternate exterior angles are congruent… Alternate Interior Angles Theorem If two parallel lines are intersected by a transversal, then the alternate interior angles are congruent. Show transcribed image text. B) If alternate Interior angles are congruent, then lines are parallel. This means, that because the diagonals intersect at a 90-degree angle, we can use our knowledge of the Pythagorean Theorem to find the missing side lengths of a kite and then, in turn, find the perimeter of this special polygon.. 62 = 8 x + 6 56 = 8 x 56 — 8 = 8 x — 8 x = 7 11. m ∠ 1 = 100 °, m ∠ 2 = 80 °, m ∠ 3 = 100 °; Because the 80 ° angle is a consecutive interior angle with both ∠ 1 and ∠ 3, they are supplementary by the Consecutive Interior Angles … Consecutive interior angles are supplementary. Corollary 12-A-2 There can be at most one right angle in One angle is supplementary to both consecutive angles (same-side interior) One pair of opposite sides are congruent AND parallel So we’re going to put on our thinking caps, and use our detective skills, as we set out to prove (show) that a quadrilateral is a parallelogram. Parallel Lines. So the given angles are congruent. Move +130 to the right side. Alternate interior angles are congruent. Formally, consecutive interior angles may be defined as two interior angles lying on the same side of the transversal cutting across two parallel lines. Theorem 3-5 Alternate Exterior Angles Theorem If two parallel lines are intersected by a transversal, then the alternate exterior angles are congruent. This framework of two pairs of consecutive congruent sides, opposite angles congruent, and perpendicular diagonals is … Expert Answer . So are angles 3 and 5. If two lines in a plane are cut by a transversal and the alternate interior angles are congruent, then the lines are parallel. If consecutive interior angles are supplementary, then the lines are parallel As seen in the picture above there are consecutive interior angles which are supplementary( adds up to 180 degrees). Then x = 5. Then 5x = 50. Since they are complementary there are parallel lines. Consecutive Interior Angles Theorem The Theorem The Consecutive Interior Angles Theorem states that the two interior angles formed by a transversal line intersecting two parallel lines are supplementary (i.e: they sum up to 180°). Home Geometry. Theorem 3-6 Consecutive Interior Angles Theorem Divide both sides by 10. C) If lines are parallel, then consecutive interior angles are supplementary. Corollary 12-A-3 There can be at most one obtuse angle in triangle. D) If consecutive Interior angles are supplementary, then lines are parallel. A) If lines are parallel, then alternate Interior angles are congruent. So x = 5.
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