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3 years ago

PLEASE HELP could this be 110, maybe?? I've tried both 40 and 100 already.

Mathematics

2 answers:

Firdavs [7]3 years ago

3 0

180-70-30=80
The answer is 80
The two triangles are the same.
Corresponding angles of congruent triangles are equal.
A triangle's three angles add up to 180 degrees.

pickupchik [31]3 years ago

3 0

Answer:

80°

Step-by-step explanation:

<A+<B+<C=180

30+<B+70=180

100+<B=180

<B=180-100

= 80

consider triangle ABC and triangle EDC

AC=CE (given

BC=CD (given

<ACB=<ECD (vertically opposite angles are equal)

therefore triangle ABC is congruent to triangle EDC

<B=<D (CPCT)

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3 years ago

PLEASE HELP could this be 110, maybe?? I've tried both 40 and 100 already.​

PLEASE HELP could this be 110, maybe?? I've tried both 40 and 100 already.