Angle PTG = arccos((18^2 + 13^2 - 27^2) / (2 x 18 x 13)) = arccos(-236 / 468) = arccos(-0.5043) = 120 degrees.
The triangle is an obtuse triangle (because one of the angles is greater than 90 degrees) and a scalene triangle (because all the sides are not equal).
1st one
√4*10 = 2√10
answer
D. 2√10
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2nd pic
√3*48 = √144 = 12
answer
A. 12
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3rd pic
√5*125 = √625 = 25
answer
B. 25
The answer is C...........
9:12 does not describe the ratio of blue marbles and red marbles
