None. Parallel lines are lines that will never cross each other, no matter how long you make them. A triangle is a polygon that has three sides and...

Does a triangle have parallel lines?

A triangle is a geometric shape that always has three sides and three angles. Triangles have zero pairs of parallel lines.

How do you prove that a triangle is isosceles?

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.

What shape is a parallel line?

Shapes are parallel if they have lines that are always the same distance from each other and will never intersect or touch. Some shapes that have parallel sides include the parallelogram, the rectangle, the square, the trapezoid, the hexagon, and the octagon.

What shapes have no parallel lines?

All types of triangle, such as equilateral triangle, isosceles triangle and scalene triangle, have no parallel lines.. A kite is another shape that does not have parallel sides.

Example involving an isosceles triangle and parallel lines | Congruence | Geometry | Khan Academy

38 related questions found

Which shape never have parallel sides?

The American term for such a quadrilateral is a trapezium, and the British term is a trapezoid. It is a quadrilateral that has no parallel sides.

What is 24th parallel line?

The 24th parallel north is a circle of latitude that is 24 degrees north of the Earth's equatorial plane, about 60 kilometres north of the Tropic of Cancer. It is the line which demarcates boundary between Pakistan and India in the general area of Rann of Kutch.

Do all Rhombuses have 2 pairs of parallel sides?

Every rhombus has two diagonals connecting pairs of opposite vertices, and two pairs of parallel sides.

Does a square have 2 pairs of parallel sides?

What is a square? A square is a quadrilateral with 4 equal sides and 4 right angles. A shape with four sides of equal length. The shape has two sets of parallel sides and has four right angles.

Which triangle is both scalene and right?

Note: It is possible for a right triangle to also be scalene or isosceles. An obtuse triangle has one angle measuring more than 90º but less than 180º (an obtuse angle).

How do you know if two lines are parallel in a triangle?

Determining if Two Lines are Parallel

Use the Triangle Proportionality Converse. If the ratios are equal, then the lines are parallel.

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

The first is if the corresponding angles, the angles that are on the same corner at each intersection, are equal, then the lines are parallel. The second is if the alternate interior angles, the angles that are on opposite sides of the transversal and inside the parallel lines, are equal, then the lines are parallel.

Are parallel lines equal?

Parallel lines are equidistant lines (lines having equal distance from each other) that will never meet. These are some examples of parallel lines in different directions: horizontally, diagonally, and vertically. Another important fact about parallel lines: they share the same direction.

Does a diamond have parallel lines?

It has two pairs of sides that are parallel. ... The opposite sides are parallel, but the corners do not form right angles. A diamond shape is a good example of a rhombus. A rhomboid has four parallel sides.

Is a square a trapezoid?

Since a square has 4 right angles, it can also be classified as a rectangle. ... The opposite sides are parallel so a square can also be classified as a parallelogram. If it is classified as a parallelogram then it is also classified as a trapezoid.

Is a rhombus a trapezoid?

Yes, a rhombus is a special type of trapezoid.

Is a diamond a rhombus yes or no?

While rhombus and trapezium are properly defined in mathematics, diamond (or diamond shape) is a layman's term for rhombus. A quadrilateral with all sides equal are in length is known as a rhombus. It is also named as an equilateral quadrilateral.

Does a rhombus have opposite sides that are not parallel?

A rhombus is a four-sided shape where all sides have equal length (marked "s"). Also opposite sides are parallel and opposite angles are equal.

Is a square a rhombus yes or no?

Square is a rhombus because as rhombus all the sides of a square are equal in length. Even, the diagonals of both square and rhombus are perpendicular to each other and bisect the opposite angles. Therefore, we can say the square is a rhombus.

Where is the 17th parallel?

The 17th parallel north is a circle of latitude that is 17 degrees north of the Earth's equatorial plane. It crosses Africa, Asia, the Indian Ocean, the Pacific Ocean, Central America, the Caribbean and the Atlantic Ocean. The parallel is particularly significant in the history of Vietnam (see below).

What is the 38th parallel called?

38th parallel, popular name given to latitude 38° N that in East Asia roughly demarcates North Korea and South Korea. The line was chosen by U.S. military planners at the Potsdam Conference (July 1945) near the end of World War II as an army boundary, north of which the U.S.S.R.