Question

The lengths of the shorter and longer parallel sides of a trapezium are a cm and b cm respectively. The
area of the trapezium is 4(a^2- b^2), then the height of the trapezium is...

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Answer 1

Answer:

Page No 17:

Question 1:

In the given figure , line RP || line MS and line DK is their transversal. ∠DHP = 85°

Find the measures of following angles.

(i) ∠RHD (ii) ∠PHG

(iii) ∠HGS (iv) ∠MGK

ANSWER:

(i) Since, RP is a straight line and ray HD stands on it, then

∠RHD + ∠DHP = 180∘ (angles in a linear pair)

⇒∠RHD + 85∘ = 180∘

⇒∠RHD = 180∘ − 85∘ = 95∘

(ii) Since the straight lines RP and DK intersect at H, then

∠PHG = ∠RHD (Vertically opposite angles)

⇒∠PHG = 95∘

(iii) Since, the line RP || line MS and line DK is their transversal intersecting them at H and G, then

∠HGS = ∠DHP (Corresponding angles)

⇒∠HGS = 85∘

(iv) Since, the straight lines MS and DK intersect at G, then

∠MGK = ∠HGS (Vertically opposite angles)

⇒∠MGK = 85∘

Step-by-step explanation:

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