Find the area of Triangle PQR.
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wvaish:
Is the length of QR given?? Is so then plz mention it
It's not mentioned but it would be 6 cm .
As QR will be equal to PR.
Because the angles are equal
Oky got it!
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In ∆PQR
angleP+angleQ+angle R=180°
120+30+angleP=180°
Angle P=30°
As two of its angles are equal ∆PQR is an isosceles triangle
So the sides PR=QR=6cm
Area of a traingle=1/2*base*height
=1/2*PR*PS
=1/2*6*4
=12cm²
angleP+angleQ+angle R=180°
120+30+angleP=180°
Angle P=30°
As two of its angles are equal ∆PQR is an isosceles triangle
So the sides PR=QR=6cm
Area of a traingle=1/2*base*height
=1/2*PR*PS
=1/2*6*4
=12cm²
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