Let x and y be two vectors in R^2. The parallelogram law of vector addition says that the vector corresponding to the diagonal of the parallelogram formed by these vectors is x+y. For the same parallelogram consider the other diagonal directed from x to y. Call this diagonal D^-> . The vector y−x can be identified with D^-> since we see geometrically that it has the same length and the same slope. This is also intuitively obvious because a rigid motion (translation) can superimpose y−x on D^-> . However we may identify D^-> with x−y as well since they too have the same slope and length. Moreover a rotation and a translation can superimpose x−y on D^-> as well. Yet it is geometrically obvious that x−y is the opposite direction of D^-> . Can someone explain why we should identify D^-> wit

The transverse axis of a hyperbola is double the conjugate axes. Whats the eccentricity of the hyperbola $$\begin{gathered} A)\frac{\sqrt{5}}{4} \\ B)\frac{\sqrt{7}}{4} \\ C)\frac{7}{4} \\ D)\frac{5}{3} \end{gathered}$$

Which of the following is an example of a pair of parallel lines?
Sides of a triangle
Surface of a ball
Corner of a room
Railway track

State whether the statements are True or False. All rectangles are parallelograms.

Point T(3, −8) is reflected across the x-axis. Which statements about T' are true?

If two parallel lines are cut by a transversal, then:
each pair of alternate angles are equal
each pair of alternate angles add up to 180 degrees
each pair of corresponding angles add up to 180 degees.
each pair of corresponding angles is equal.

The opposite faces of a dice always have a total of ___ on them.

What is the term for a part of a line with two endpoints?
A. Line Segment
B. Line
C. Ray
D. Point

ABCD is a parallelogram. Which of the following is not true about ABCD?
AB=CD
AD=CB
AD||CD
AB||CD

If the points $(a,0)$, $(0,b)$ and $(1,1)$ are collinear then which of the following is true?
$\frac{1}{a}+\frac{1}{b}=1$
$\frac{1}{a}-\frac{1}{b}=2$
$\frac{1}{a}-\frac{1}{b}=-1$
$\frac{1}{a}+\frac{1}{b}=2$

The angles of a triangle are in the ratio 1 : 1 : 2. What is the largest angle in the triangle?
$$\begin{gathered} A){90}^{\circ <!--\; \circ \; -->} \\ B){135}^{\circ <!--\; \circ \; -->} \\ C){45}^{\circ <!--\; \circ \; -->} \\ D){150}^{\circ <!--\; \circ \; -->} \end{gathered}$$

What is the greatest number of acute angles that a triangle can contain?

How many right angles are required to create a complete angle?
1) Two
2) Three
3) Four
4) Five

Find the sum of interior angles of a polygon with 12 sides in degrees.$$\begin{gathered} {1800}^{\circ } \\ {1200}^{\circ } \\ {1500}^{\circ } \\ {1400}^{\circ } \end{gathered}$$

In Euclid's Division Lemma when $a=bq+r$ where $a,b$ are positive integers then what values $r$ can take?

When two lines cross each other at a point we call them ___ lines.