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2018 Hanoi Open Mathematics Competitions
2
area of rectangle (HOMC 2018 Team j2)
area of rectangle (HOMC 2018 Team j2)
Source:
January 31, 2020
geometry
rectangle
Problem Statement
Let
A
B
C
D
ABCD
A
BC
D
be a rectangle with \angle ABD = 15^o, BD = 6 cm. Compute the area of the rectangle.A.
9
9
9
cm
2
^2
2
B.
9
3
9 \sqrt3
9
3
cm
2
^2
2
C.
18
18
18
cm
2
^2
2
D.
18
3
18 \sqrt3
18
3
cm
2
^2
2
E.
24
3
24 \sqrt3
24
3
cm
2
^2
2
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