Figure pqrs is a parallelogram.

what are the measures of angles p and s?

∠p = 20°; ∠s = 160°
∠p = 40°; ∠s = 140°
∠p = 140°; ∠s = 40°
∠p = 160°; ∠s = 20°

Third choice

i) ∠P = 140°

ii) ∠S = 40°.

Explanation:

1) Since the figure is a parallelogram, you know that the angles meet these conditions:

i) ∠P = ∠R = 6x - 10°

ii) ∠Q = ∠S = x + 15°

iii) Condition for a quadrilateral: ∠P + ∠R + ∠Q + ∠S = 360°

2) Now you only need to operate algebraically to solve an equation:

i) replace the valvues in the condition for a quadrilateral:

2 (x + 15) + 2 (6x - 10) = 360

ii) Divide both sides by 2:

x + 15 + 6x - 10 = 180

iii) transpose terms and combine like terms:

7x = 180 - 15 + 10

7x = 175

x = 175 / 7

x = 25°

3) Replace the value of x in each angle:

i) ∠P = ∠R = 6x - 10° = 6 (25) - 10° = 140°

ii) ∠Q = ∠S = x + 15° = 25° + 15° = 40°.

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