The angle 1 and the side equal to 72° together equal 180. 72 + x = 180 using the subtraction property of equality we can conclude that x = 108.

Side 2 is parallel with 72° making them equal and Side 3 is parallel with 108° making them equal.

Side 1 = 108°

Side 2 = 72°

Side 3 = 108°

**Answer:**

**Step-by-step explanation**

**Cluster- a group of points that close together**

**symmetry- data is balanced on opposite sides of a point or line**

**spread- how close or far apart the values are in a data set**

**center- the middle of a data set**

**gap- a space between data values**

**Answer:**

1. Isosceles Triangle

2. ∠D = 160°

**Step-by-step explanation:**

1.

7x + 5 + x + 20 + 2x + 5 = 180 (all angles in a triangle add up to 180)

10x = 150

x = 15°

∠A = 7x + 5

sub x = 15°

∠A = 7x + 5

∠A = 120°

∠B = x + 20

x = 15

∠B = 35

∠C = 2x + 5

x = 15

∠C = 35

Base angles are the same, so this triangle is **isosceles**

2.

3x + (2x - 1) + (x + 3) + (3x - 3) + (x - 2) = 540 (all angles in a 5-sided polygon equals 540°)

10x = 540 + 1 - 3 + 3 + 2

10x = 543

x = 54.3

∠D = 3x - 3

x = 54.3

∠D = 159.9

if you round it, it would about 160°

**Answer:**

Angle RTS

**Step-by-step explanation**

**Say it out loud it goes, RS, ST.**

**If you put RS and ST together the angle RTS**

**Answer:**

This is to complex

**Step-by-step explanation:**

sorry for not being able to help