Determine the area of the quadrilateral shown, \(OB = 80\) cm, \(AO = 120\) cm, \(OD = 150\) cm and \(\phi = 25^\circ\).
A\(2721.66 \text{ cm}^2\)
B\(2271.66 \text{ cm}^2\)
C\(2172.66 \text{ cm}^2\)
D\(2217.66 \text{ cm}^2\)
#42📜 CE Board October 1997
Find the area of a quadrilateral have sides \(12\) m, \(20\) m, \(8\) m and \(16.97\) m. if the sum of the opposite angles is equal to \(225^\circ\) find the area of the quadrilateral.
A\(100 \text{ m}^2\)
B\(124 \text{ m}^2\)
C\(168 \text{ m}^2\)
D\(158 \text{ m}^2\)
#43📜 ME Board October 1996
The area of a regular hexagon inscribed in a circle of radius \(1\) is
A1.316
B2.945
C2.598
D3.816
#44📜 EE Board April 1990
Find the area (\(\text{in cm}^2\)) of a regular octagon inscribed in a circle of radius \(10\) cm?
A283
B289
C298
D238
#45📜 GE Board February 1992
A regular hexagon is inscribed in a circle whose diameter is \(20\) m. Find the area of the \(6\) segments of the circle formed by the sides of the hexagon.
A36.45 sq. m
B63.54 sq. m
C45.63 sq. m
D54.36 sq. m
#46📜 EE Board April 1993
Find the area of a regular pentagon whose side is \(25\) m and apothem is \(17.2\) m.
A\(1075 \text{ m}^2\)
B\(1085 \text{ m}^2\)
C\(1080 \text{ m}^2\)
D\(1095 \text{ m}^2\)
#47📜 ME Board October 1996
The area of a circle is \(89.42\) sq. inches. What is the length of the side of a regular hexagon inscribed in a circle?
A5.533 in.
B5.335 in.
C6.335 in.
D7.335 in.
#48📜 EE Board April 1990
In a circle of diameter of \(10\) m, a regular five-pointed star touching its circumference is inscribed. What is the area of that part not covered by the star?
A40.5 sq. m
B45.5 sq. m
C50.5 sq. m
D55.5 sq. m
#49📜 EE Board March 1998
A regular pentagon has sides of \(20\) cm. An inner pentagon with sides of \(10\) cm is inside and concentric to the larger pentagon. Determine the area inside and concentric to the larger pentagon but outside of the smaller pentagon.
A\(430.70 \text{ cm}^3\)
B\(573.26 \text{ cm}^3\)
C\(473.77 \text{ cm}^3\)
D\(516.14 \text{ cm}^3\)
#50📜 EE Board March 1999
Determine the area of a regular \(6\)-star polygon if the inner regular hexagon has \(10\) cm sides.
A\(441.66 \text{ cm}^2\)
B\(467.64 \text{ cm}^2\)
C\(519.60 \text{ cm}^2\)
D\(493.62 \text{ cm}^2\)
#51
What conic section is 2x² - 8xy + 4x = 12?
AParabola
BEllipse
CHyperbola
DCircle
#52
What conic section is described by the equation r = 6 / (4 – 3cosӨ)?
ACircle
BEllipse
CHyperbola
DParabola
#53
If the second-degree equation Ax² + Bxy + Cy² +Dx + Ey + F = 0 represents a real conic and B² – 4AC is positive, then it is
Aellipse
Bcircle
Cparabola
Dhyperbola
#54
If the slopes of two lines are equal and their y-intercepts are different, then the lines are
Aintersecting
Bparallel
Ccoincident
Dperpendicular
#55
A line with inclination between 0° and 90° has
Azero slope
Bno slope
Cpositive slope
Dnegative slope
#56
The parabola x² – 4x + 2y – 6 = 0 opens
Adownward
Bupward
Cto the right
Dto the left
#57
The locus of a point on a circle which rolls without slipping on a straight line is called
Astrophoid
Btrochoid
Castroid
Dcycloid
#58
If b² – 4ac < 0, then the graph of y = ax² + bx + c
Acrosses the x-axis once
Bcrosses the x-axis twice
Cdoes not cross the x-axis
Dtouches the x-axis once
#59
The slope of a vertical line is
Azero
Bone
C90°
Dundefined
#60
If the inclination θ of a line is an obtuse angle, then the tangent of θ is