• #### NDA Exam Mathematics Study Material

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a)         15
b)         45
c)         60
d)         54

##### Two sides of an isosceles triangle measure 3 and 5.  Which of the following could be the measure of the third side?

a)         9
b)     5
c)    7
d)     3

##### The midpoints of the sides of triangle PQR are labeled X, Y and Z.  If the perimeter of triangle XYZ is 26, find the perimeter of triangle PQR.

a)        48
b)    52
c)   84
d)   116

##### In a triangle PQR, if PQ=PR and QR is produced to S such that angle PRS=120° then angle P is equal to

a)         60°
b)    30°
c)   90°
d)    120°

a)         120O
b)          70O
c)         110O
d)         130O

a)          70O
b)          50O
c)          90O
d)         110O

##### The sides of a triangle are 6, 8 and 12.  Find the length of the longest side of a similar triangle whose shortest side is 18.

a)         10
b)    16
c)    20
d)     36

##### The vertex angle of an isosceles triangle measures ten times the measure of a base angle.  Find the measure of a base angle.

a)         30°
b)   45°
c)    15°
d)   60°