83.8k views
0 votes
Find m<BCD
HELP PLSSSS​

Find m<BCD HELP PLSSSS​-example-1
User Shobull
by
8.8k points

1 Answer

2 votes

Explanation:

The sum of two interior angles in a triangle is equal to an exterior angle that is supplementary to the third interior angle.

Based on the above-mentioned information, we can write the following equation:

40 + 2x + 20 = 3x + 10

  • Add like terms.

2x + 60 = 3x + 10

  • Transfer like terms to the same side of the equation.

60 - 10 = 3x - 2x

40 = x

Replace x with 40 to find the measure of ∠BCD:

3 × 40 + 10 = 130

User BobB
by
7.5k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories