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What shape has two right angles and 4 obtuse angles and one line of symmetry?
Not sure that it has a name. Start with a square standing on a vertex. Cut of the top and bottom vertices with horizontal lines. The shape will resemble one isosceles trapezium sitting on its short side and supporting an inverted congruent isosceles trapezium.
What is an iosocelus trapezium?
An isosceles trapezium has one pair of sides parallel to each other and the other pair that are of equal length (but facing in opposite directions). An isosceles trapezium can be imagined as an isosceles triangle whose top has been chopped off by a line parallel to its base.
When are three sides of a trapezoid congruent?
An isosceles trapezium in which the sloped sides are congruent to either the base or the top will have a total of three congruent sides. The top and bottom MUST be different.
What type of angles do isosceles triangles have?
Isosceles triangles have two equal sides. The angles opposite the equal sides are also equal. For instance, if the top angle is 48o and the two bottom angles are 66o an acute isosceles triangle is formed.
What do angles in a trapezium add up to?
The internal angles add up to 360 degrees. If the trapezium has its base parallel to the top then the internal angles on the left of the parallel lines add to 180 degrees, the angles on the right add to 180 degrees.
Does a trapezoid have three congruent sides?
An isosceles trapezium will have two and can have three congruent sides. But the base and top MUST be different.
You have 3 sides of an isosceles triangle how do you work out the top angle?
In an isosceles triangle, the two angles at the bottom are equal. Subtract the sum of the two bottom angles from 180 to find how many degrees are in the top angle.
What angles of an isosceles trapezoid are congruent?
The pair of angles at the end of each parallel side - the two base angles and the two top angles - are congruent.
How an isosceles trapezoid is related to an isosceles triangle?
Both have equal sides and equal base angles An isosceles trapezoid is made from an isosceles triangle that's had its top cut off parallel to its base
What is a 4 sided shape with 2 unequal sides called?
If the implication is that it is a quadrilateral with one a pair of equal sides and one pair of unequal sides, it could be an isosceles trapezium, or a non-isosceles trapezium one of whose sloped sides is equal to either the base or the top, or a distorted kite or arrowhead - neither of which have a specific name.
Is it only in an isosceles triangle that the base angles are equal?
No. It need not be the base angles that are equal, it can be one of the base angles and the top angle (if the triangle is tipped over). Also, the base angle are equal in an equilateral triangle - although an equilateral triangle is a special kind of isosceles triangle.
How many right angles does a trapezium have?
A trapezium (or trapezoid in North America) does not necessarily have any right angles. The only requirement is that it is a quadrilateral (4 sided polygon) with one pair of parallel sides. If one of the sides is perpendicular to the bottom base, then it is also perpendicular to the top (so 2 right angles). If the other side is also perpendicular to the bottom base then it will be perpendicular to the top base as well, then it is a rectangle, with four right angles.
