Solve the Secret Country by Doing Math Problems #3

Solve these math problems as fast as you can. Once you solve a problem, the next one will be revealed. Completing every fifth problem reveals a clue pertaining to the country to be guessed. Once you've finished all the math problems, guess the country to end the quiz!

The previous quiz in this series can be found here (#2)

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Last updated: May 17, 2022

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First submitted	May 16, 2022
Times taken	339
Average score	57.7%
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Problem	Solution
Find the area of the triangle with:
base 12 and height 7	42
base 15 and height 10	75
base 8 and height 13	52
base 14 and height 9	63
base 16 and height 16	128
Find the hypotenuse of the right triangle with opposite and adjacent lengths:
3 and 4	5
5 and 12	13
1 and 3	√10
1 and 2	√5
4 and 4 (give your answer in simplest form)	4√2
Find the perimeter of the rectangle with:
length 7 and width 5	24
length 9 and width 7	32
length 15 and width 12	54
length 17 and width 20	74
length 25 and width 20	90
Convert these radian measures into degrees:
π/6	30°
π/2	90°
2π/3	120°
3π/4	135°
π	180°
Find the area of the circle with:
radius 4	16π
radius 6	36π
diameter 18	81π
diameter 14	49π
circumference 10π	25π