## How could you prove ABCD is a rhombus?

In geometry, a rhombus is a quadrilateral that has all equal sides, with opposite sides parallel to each other. The quadrilateral ABCD is a rhombus, with AB = BC = CD = AD. AB is parallel to CD (AB||CD), and BC is parallel to AD (BC||CD).

**How do you prove a triangle is isosceles in coordinate geometry?**

One way of proving that it is an isosceles triangle is by calculating the length of each side since two sides of equal lengths means that it is an isosceles triangle.

### How do you prove isosceles trapezoid with coordinates?

Method: First, show one pair of sides are parallel (same slope) and one pair of sides are not parallel (different slopes). Next, show that the legs of the trapezoid are congruent. Example 2: Prove that quadrilateral MILK with the vertices M(1,3), I(-1,1), L(-1, -2), and K(4,3) is an isosceles trapezoid.

**What’s a coordinate proof?**

The coordinate proof is a proof of a geometric theorem which uses “generalized” points on the Cartesian Plane to make an argument. The method usually involves assigning variables to the coordinates of one or more points, and then using these variables in the midpoint or distance formulas .

#### How do you prove something is a rhombus and not a square?

If all sides of a quadrilateral are congruent, then it’s a rhombus (reverse of the definition). If the diagonals of a quadrilateral bisect all the angles, then it’s a rhombus (converse of a property).

**How do you prove that two lines are parallel in a rhombus?**

To show that two lines are parallel, we can use the converse of the Corresponding Angles Theorem, (that is, show that 2 corresponding angles are congruent) or the converse Alternate Interior Angles Theorem (show that the interior alternating angles or exterior alternating angles are congruent), whichever is easier.

## How do you know if a triangle is an isosceles?

A triangle with two sides of equal length is an isosceles triangle. The two equal sides of an isosceles triangle are known as ‘legs’ whereas the third or unequal side is known as the ‘base’.

**How do you prove a triangle is isosceles with coordinates?**

Steps to Coordinate Proof. Given the coordinates of the triangle’s vertices, to prove that a triangle is isosceles. plot the 3 points(optional) use the distance formula to calculate the side length of each side of the triangle. If any 2 sides have equal side lengths, then the triangle is isosceles.

### How do you prove a rhombus is a coordinate?

The one main way to prove that a quadrilateral is a rhombus is to prove that the distances of the four sides of the quadrilaterals are congruent (equal distances) and then prove that the diagonals of the quadrilateral are not congruent (unequal distances). Click to see full answer. Consequently, what is a coordinate proof example?

**How do you prove a quadrilateral is a rhombus?**

Use coordinate geometry to prove that the quadrilateral formed by connecting the midpoints of the sides of a rectangle is a rhombus. Given:MNPOis a rectangle. T,W,V,Uare midpoints of its sides. Prove:TWVUis a rhombus. Plan: Place the rectangle in the coordinate plane with two sides along the axes. Use multiples of 2 to name coordinates.

#### Is ・уoy an isosceles right triangle?

Triangle TOY has coordinates T(-4, 2), O(-2, -2), and Y(2, 0). Prove ・УOY is an isosceles right triangle. 29 Day 4 窶・/font>Practice writing Coordinate Geometry Proofs 1. The vertices of ・БBC are A(3,-3), B(5,3) and C(1,1).