use the inverse sine or cosine or tangent
No. Given a triangle with only the right angle and the hypotenuse, you cannot calculate the other sides nor the other angles.
When each of the 3 interior angles measure less than 90 degrees and the 3 sides are of different lengths
You cannot.
I would say that another word for quadrangle would be quadrilateral. Literally, quadrangle means four angles, just as triangle means three angles. So if you were classifying plane figures by sides and angles, that might work. A convex figure with four sides would have four angles.
Yes. Try making an obtuse triangle with equal sides. It doesn't work. All angles are equal to 60 degrees in an equilateral triangle.
No. Given a triangle with only the right angle and the hypotenuse, you cannot calculate the other sides nor the other angles.
When each of the 3 interior angles measure less than 90 degrees and the 3 sides are of different lengths
You cannot.
A triangle has no sum. There can be a sum of the measures of two or more angles, or the lengths of two or more sides, for example.
The only Two Triangle congruence shortcuts that do not prove congruence are: 1.AAA( Three pairs of angles in a triangle) & 2.ASS or SSA(If the angle is not in between the two sides like ASA.
Using the trigonometrical cosine formula for a triangle the angles work out as 28.91 degrees 31.99 degrees and 119.10 degrees which add up to 180 degrees.
Using the cosine rule in trigonometry the angles work out as 40.11 degrees, 57.9 degrees and 81.99 degrees
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.
You use the cosine rule: cos(C) = (a2 + b2 - c2)/(2ab) So angle C can be calculated.
I would say that another word for quadrangle would be quadrilateral. Literally, quadrangle means four angles, just as triangle means three angles. So if you were classifying plane figures by sides and angles, that might work. A convex figure with four sides would have four angles.
Yes. Try making an obtuse triangle with equal sides. It doesn't work. All angles are equal to 60 degrees in an equilateral triangle.
No. A obtuse angle cannot be a right triangle- it is so wrong that it can't even be a left angle (While true, this part is of course, a joke...).There are two ways we name our triangles: using angles and how long the angles' sides are. The angles: there are three. The measurements: there are also three.The measurement triangles (aka. how long the angles and sides are) come in three types: the equilateral, the isosceles, and the scalene.The equilateral triangle has angles the measure sixty degrees and all sides measure the same length.The isosceles triangle has two sides that measure the same length, but one side has a different measurement. Same thing with the angles.The scalene triangle has all sides a different length with all sides a different measurement for the angles.The angled triangles work on three angles: the acute, the right, and the obtuse.The acute triangle's "A" point to its "B" point's angle is an angle that is acute.The right triangle's "A" to its "B" is a right angle...And the obtuse triangle's "A" to its "B" is an obtuse angle.Right angles and obtuse angles are way different...Right angles measure ninty degrees while obtuse angles measure more than ninty degrees but less than one hundred eighty degrees.Therefore, there is no such thing as an obtuse righttriangle.