Geometry Answers

prove that tangents drawn at the ends of a diameter of a circle are parallel

if perimeter of semi circular park is 72 m ,find its area and radius

rewrite the statement complementary angles have measures which add up to 90 degrees in if-then form. Then, write the converse, inverse, and contra-positive of the statement. Finally, state whether each is true or false.

Given that AB is a tangent of the circle with the center at X, AB = 12, and XD = 2.5, which is the length of DB?

Hi;

Let S^2 be a 2-dimensional unit sphere in R^3. Let u and v be two unit vectors in R^3 (so in S^2). We will define a binary operation on S^2 by u*v is a unit vector obtained by rotating a vector u along v by 180 degree (Pi).

Define stab(x)={y in S^2: y*x=x}. My question is find stab(x) where x is in S^2.

What theorem or postulate can be used to justify that ?

Lines p and q intersect to form adjacent angles 1 and 2. If angle 1=8x+4 and angle 2=9x-4 find x so that p is perpendicular to q.

AB is a chord of a circle with centre O.AB is produced to C,such that BC=OB.CO is joined and produced to meet the circle in D.If Angle ACD=XY and Angle AOD=X,prove that X=3Y

two vertical poles have heights of 7 feet and 12 feet. A rope is stretched from the top of each pole to the bottom of the other. Exactly how far above the ground do the ropes cross?

What is the x-intercept of the graph: 2x + 4y = -10