The sum of the interior angle measures of abc is 180 proof

The Proof for, The sum of the interior angle measures of ΔABC is 180° is below.

Step-by-step explanation:

Given:

Draw a ΔABC ,

Construction:

Draw PQ Parallel to Side of triangle BC,

PQ || BC

To Prove:

The sum of the interior angle measures of ABC is 180.

Proof:

P - A - Q is a Straight Line, m∠PAQ = 180°      ...... Straight Angle

∴ ....Angle Addition Postulate...........( 1 )

PQ || BC

.....Alternate Angle Postulate as PQ || BC...( 2 )

Similarly,

.....Alternate Angle Postulate as PQ || BC...( 3 )

Now by Substituting ∠PAB and ∠QAC in  ( 1 ) and ,Transitive Property we get From ( 1 ) , ( 2 ) and ( 3 )

...Proved

i.e The sum of the interior angle measures of Δ ABC is 180°

There is no question, there is just the answer.

The skating rink rented 872 pairs of skates during april and may.why? : if the skating rink rented three times the pair of skates in april during may, they rented 654 skates. 218 x 3 = 654then, if they want to know how many they rented during both april and may, then you just add 654 (may) and 218 (april) to give you 872 pairs of skates for both months.654 + 218 = 872hope this !