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    Lines and Angles
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    In ∆ABC, the bisectors of ∠ABC and ∠BCA intersect each other at 0. The measure of ∠BOC is:
    • 90 degree plus angle straight A
    • 180 degree plus angle straight A
    • 90 degree plus fraction numerator angle straight A over denominator 2 end fraction
    • 90 degree plus fraction numerator angle straight A over denominator 2 end fraction

    B.

    180 degree plus angle straight A
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    Answer
    Two lines are respectively perpendicular to two perpendicular lines then these two lines to each other are:
    • parallel 
    • perpendicular
    • inclined at some acute angle
    • inclined at some acute angle

    B.

    perpendicular
    409 Views
    Answer
    In figure, AB and CD are parallel to each other. The value of x is:
    • 90° 
    • 100°
    • 120°
    • 120°

    B.

    100°
    238 Views
    Answer
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    One of the angles of a triangle is 75°. If the difference of the other two angles is 35°, then the largest angle of the triangle has a measure of:
    • 80°  
    • 75°
    • 100°  
    • 100°  

    B.

    75°
    142 Views
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    In ∆ABC, ∠A = 50° and the external bisectors of ∠B and ∠C meet at O as shown in figure. The measure of ∠BOC is:
    • 40°
    • 65°
    • 115° 
    • 115° 

    C.

    115° 
    106 Views
    Answer
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