76Larger circle radius of annulus (given area and smaller circle radius)
77Smaller circle radius of annulus (given area and larger circle radius)
78Area of ellipse (given major and minor axes)
79Major axis or transverse diameter of ellipse (given area and minor axis)
80Sum of interior angles of polygon (given number of sides)
81Number of sides of a simple closed polygon (given sum of internal angles)
82Median line length of trapezoid (given lengths of the parallel sides)
83Base of Trapezoid (given median line length and the other base)
84Interior angle of equilateral polygon (given number of edges)
85Length of internal common tangent of two circles (given distance between centers and radius)
86Exterior common tangent of two circles (given distance between centers and radius)
87Area of a convex quadrilateral (given diagonals and angle)
88Diagonal length of a convex quadrilateral (given area,angle and another diagonal)
89Area of Trapezoid (given lengths of parallel sides and height)
90Length of one parallel side of trapezoid (given area, base and height)
91Height of Trapezoidal (given area and lengths of parallel sides)
92Area of circle (given radius)
93Radius of circle (given area)
94Perimeter of circle (given radius)
95Radius of circle (given perimeter)
96Area of circular sector (given radius and angle)
97Radius of circular sector (given area and angle)
98Central angle of circular sector (given area and radius)
99Area of rhombus using trigonometry (given edge and angle)
100Area of triangle (given two sides and angle)