Since, Parallelogram RSTU is a rhombus. thus, it is a property of rhombus that opposite angles have equal measure.

You are watching: If rstu is a rhombus then

Thus, m∠R = 120° =m∠T

Also, m∠U = m∠S

Let it be x°.

Angle sum property of parallelogram states that the sum of angles of a parallelogram is 360°.

m∠R + m∠T+ m∠U + m∠S = 360°

120 +!20 +x + x = 360

2x = 360 - 240

2x = 120

x = 60°

Thus, m∠U = m∠S = 60°

Also in Rhombus, each diagonal bisects two opposite interior angles.

Then , US is a diagonal bisecting ∠U and ∠S.

m∠RSU = 30° = m∠TSU

Thus, m∠RSU = 30°

Answer from: Juanga122

A. it must be a parallelogram

Step-by-step explanation:

The answer is "A. it must be a parallelogram" because every rhombus is a parallelogram.

Answer from: 1630013

answer:

c is the correct answer

step-by-step explanation:

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Answer from: whitethunder05

kaya niyoba yan di ko kaya yan kasi wala kaming ganyan

Answer from: ednalovegod

∠RSU=30° and ∠T=120°

Step-by-step explanation:

Given a parallelogram RSTU and m∠T = 120°. We have to find the measure of angle m∠RSU.

As opposite angles of parallelogram are equal

⇒ m∠R=m∠T=120°

In ΔRUS,

By angle sum property of triangle which states that sum of all the angles of triangle is 180°

m∠RUS+m∠URS+m∠RSU=180°

⇒ m∠RSU+120°+m∠RSU=180° (∵RSTU is a rhombus.)

⇒ 120°+2m∠RSU=180°

⇒ 2m∠RSU=60° ⇒ m∠RSU=30°

Answer from: derrishamckenzie22

A. It must be a parallelogram

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