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Does a triangle have 2 congruent sides?
Some, but not all. Triangles with 2 congruent sides are called isoceles triangles. Triangles with 3 congruent sides are called equilateral triangles.
A valid argument which shows that a mathematical statement called a theorem is true?
Pythagoras' theorem is only theorem regarding right angle triangles but it is true.
What is all three sided shapes called?
Triangles.
What mathematical term rhymes with square and refers to triangles?
How about 'triangular'
Some equilateral triangles are not isosceles?
All isosceles triangles are not equilateral triangles
What is a 3 sided triangle called?
All triangles have three sides
Are all equilateral triangles acute triangles?
Yes all equilateral triangles are acute triangles, but not all acute triangle are equilateral triangles.
Are triangles equilateral?
Triangles can be classified into different shapes. Equilateral ; All sides the same length ; all angles equal 60 degrees. Isosceles ; Two sides the same length ; two angles equal size. Right-Angled ; Three sides can be of different lengths ; MUST have one right-angle. Scalene ; All sides of different lengths ; all angles of different size. Common 2-dimensioanal characteristics for ALL triangles. ; - They contain three(3) sides They contain three(angles) The internal angles ALWAYS sum to 180 degrees. A triangle may also be named a TRIGON ; A polygon of three sides. NB Triangles drawn on a 3-dimensional surface ( sphere ), the above characteristics can vary.
Are all triangles semmetrical?
No. But all isosceles triangles and equilateral triangles are.
Are some isosceles triangles equilateral triangles?
All isosceles triangles are not equilateral triangles
If two triangles have three pairs of congruent angles are the triangles guaranteed to be congruent?
No- triangles with all angles respectively equal need not be congruent. For example, all equilateral triangles have 3 angles of 60 degrees each but the the sides could be any length. However the sides of such triangles are proportional - such triangles are called similar. They look alike except for their scale.
What are the properties of isosceles triangles?
All isosceles triangles: - Have angles that add up to 180 degrees - Have two equal sides. The unequal side is called the base. - Have equal base angles. - Have areas and perimeters that can be found using the formulas Area=1/2 X (base X height) and Perimeter=side+side+side An equilateral triangle with a right angle is called a right isosceles triangle. Also, all equilateral triangles are isoceles triangles, but not all isosceles triangles are right triangles.
