Question

4. Classify the triangle by its sides. The lengths of the sides are 9, 9, and 9.

Answer 1

Answer:

4. Option A is correct.

7. Option C is correct.

8. Option A is correct.

11. Option B is correct.

12. Option C is correct

Step-by-step explanation:

4.

The sides of equilateral triangle are same.

It is given that lengths of the sides are 9, 9, and 9.

Since the side lengths are same, therefore the given triangle is an equilateral triangle.

Option A is correct.

7.

It is given that the line a is parallel to line b and the measure of angle 7 is 135 degree.

$\angle 6+\angle 7=180^{\circ}$              (Supplementary angles)

$\angle 6+135^{\circ}=180^{\circ}$

$\angle 6=45^{\circ}$

$\angle 4=\angle 6$                     (Alternative interior angles)

$\angle 4=45^{\circ}$

Option C is correct.

8.

$x-3=65$              (Corresponding angles)

$x=68$

$46+65+y-3=180$                                    (Supplementary angles)

$y=72$

Option A is correct.

11.

If a transversal line intersect two lines are parallel lines, then their corresponding angles are same.

It is given that

$\angle 1=\angle 2$

Since angle 1 and 2 are corresponding angles, therefore we can say that the lines a and b are parallel.

Option B is correct.

12.

$x-1=63$              (Corresponding angles)

$x=64$

Option C is correct.

Answer 2

The answer to #4 is A equilateral because all the sides are the same. the sides are equal. 
# 7 would be c, 45 you have to make sure the sum is 180 #8 is B the same goes for that on fill in x and y. #11 isD And # 12 is c the sum must be 180.<span />