Question3 ⇒Visiting the properties of a parallelogram one of them states that opposite angles of a parallelogram are equal.
Opposite angle n this case of a parallelogram are ∠R and ∠T
∠S and ∠Q
⇒This means that: ∠R since opposite ∠T they are equal
⇒∠S since opposite ∠Q they are equal
If ∠T =135° and we know that ∠T=∠R ∴∠R=135° too
⇒One of the properties of a parallelogram states that two pairs of opposite sides are parallel In this Case VW║UX and VU║WX
If so analyzing the diagram(shape) we find that m∠V is co-interior with m∠U by reason VW║UX this means
⇒ m∠V+ m∠U=180°
Given that m∠U=80° substitute in the equation above and solve for m∠V
m∠V+80°=180°
m∠V=180°-80°
m∠V=100°