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That depends upon the lengths of the sides. If the three side lengths are A, B and C, then the three angles are given by:- # a = cos-1( (B2 + C2 - A2) / (2BC) ) # b = cos-1( (A2 + C2 - B2) / (2AC) ) # c = cos-1( (A2 + B2 - C2) / (2AB) )
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoAll angles less than 90 degrees : acute angled triangle
One angle equal to 90 degrees: right angled triangle
One angle greater than 90 degrees: obtuse angles triangle.
Although the following names derive from the properties of the sides of a triangle, the definitions can also be determined by the properties of a triangle's angles:
All three angles equal (to 60 degrees): equilateral
Two angles equal, but different from the third: isosceles
All three angles different: scalene
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What is the measure of angle 3?
A triangle has three angles. The sum of these 3 angles = 180°. At least two of the 3 angles will be acute angles (less than 90°). The third angle can be acute, or a right angle (equal to 90°) or obtuse (between 90° and 180°). Triangles can be categorized by the angles (acute, right or obtuse).
Isosceles triangles equal 180 degrees?
The total sum of angles of a triangle is 180, so only one angle of a triangle can be 90 ( making it a right angled triangle).However the sum of two angles of a triangle can be equal to 90, once again making it a right angled triangle.it is possible that two angle can be equal to 180-The acute angles of a right triangle are complementary.SUPPOSE ABC IS A TRIANGLE, where C = 90, thenA+B+90 = 180,A+B = 180-90or A+B = 90,or A = 90-Bso it's possible.
Does a diagonal of a parralelogram divide a parallelogram into two congruent triangles?
Yes, the diagonal splits the parallelogram into two equal triangle aka congruent the sides will stay the same, the two angles being divided are going to be split in half, one on each side, so its the same
Are p angles right angles from each other?
p orbitals are at right angles to each other, there are three.
What is orthogonal?
It means "at right angles".
Do Similar triangles have proportional angles?
Similar triangles don't just have proportional angles, they have IDENTICAL angles!
What are triangles that have equal corresponding angles?
Isoceles triangles and right triangles have 2 corresponding equal angles three equal corresponding angles are equilateral triangle
Are triangles equilateral?
Some triangles are equilateral, but not all of them. There are three types of triangles. Triangles which have three equal sides and three equal angles are called equilateral triangles. Isosceles triangles have two equal sides and two equal angles. Scalene triangles have no equal sides and no equal angles.
How many angles are in 8 triangles?
1 triangle = 3 angles. 8 triangles = 8*3 = 24 angles!
Do triangles have at least one right angle?
Triangles can be classified by their sides or their angles. When classifying them by their angles, triangles are called: acute triangles - all three angles are acute (less than 90º) right triangles - one right angle (90º) and two acute angles obtuse triangles - one obtuse angle (larger than 90º) and two acute angles
How many angles are in four triangles?
1 triangle = 3 angles so 4 triangles = 4 x 3 = 12 angles unless some triangles are within others
Do all triangles have the same sum of their angles?
Yes, all triangles have the sum of their angles as 180 degrees.
How can you classify triangles by their angles?
Triangles may be right triangles equilateral triangles acute or obtuse triangles
How you can prove that the angles of two triangles are equal?
If the angles of two triangles are equal the triangles are similar. AAA If you have three angles on both triangles these must be equal for the triangles to be similar. SAS If you have an angle between two sides and the length of the sides and the angle are the same on both triangles, then the triangles are similar. And SSS If you know the three sides
Why don't triangles have right angles?
Right angled triangles do!
What types of triangles have at least two acute angles?
All triangles need at least two acute angles
Triangle has no equal anles or sides?
Equaliateral Triangles have all three sides and angles (60 degrees)equal Isosceles Triangles have to equal sides and angles Scalene Triangles have no equal sides or angles
