Which polygon appears to be regular?

Figure A

Figure B

Figure C

Figure D
Figure A is a square. Figure B is a parallelogram. Figure C is a right triangle. Figure D is a trapezoid.

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

Refer to the table below if needed. second quadrant third quadrant fourth quadrant sin(1800- - cos(180° -) tan(180°-e) =- tane cot(1800-0) 10 it to solo 888 sin(180° +c) = - sine cos(180° +) =- cose tan(180° +c) = tane cot(180° +o) = cote sec(180° + c) = - seco csc(180° +2) = - csce sin(360° -) =- sine cos(360° -) = cose tan(360° - e) =- tane cot(360° -) = -cote sec(360° -) = seco csc(360° -) = csco sec(180° -) = csc(180° -) = csca 1991 given that sine = 3/5 and lies in quadrant ii, find the following value. tane

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.