Angle abc will form a right angle if and only if, segment ab is perpendicular to segment bc.
To determine the measure of angle ( a ) that will make triangles ( ABC ) and ( FDE ) similar (denoted as ( ABC \sim FDE )), you would typically use the Angle-Angle (AA) similarity criterion. This means that if two angles of triangle ( ABC ) are equal to two angles of triangle ( FDE ), then the measure of angle ( a ) must equal the corresponding angle in triangle ( FDE ). If more specific information about the angles in the triangles is provided, a precise measure for angle ( a ) can be calculated.
In a right triangle, the sum of the angles is always 180 degrees, with one angle measuring 90 degrees. Therefore, the measures of the other two angles, including angle ABC, must add up to 90 degrees. To find the measure of angle ABC, you would need the measure of the other non-right angle in the triangle. If, for example, angle BAC is known to be 30 degrees, then angle ABC would measure 60 degrees.
The sum of the internal angles of a triangle is 180º. If B is a right angle it has 90º, so there are only 90º left for the other two angles, meaning that they cannot be right!
The sum of the two angles is 360. So angle ABC = 120 degrees.
If triangle ABC is congruent to triangle FED, then the corresponding angles are equal. Therefore, angle C in triangle ABC is equal to angle D in triangle FED.
To determine the measure of angle ( a ) that will make triangles ( ABC ) and ( FDE ) similar (denoted as ( ABC \sim FDE )), you would typically use the Angle-Angle (AA) similarity criterion. This means that if two angles of triangle ( ABC ) are equal to two angles of triangle ( FDE ), then the measure of angle ( a ) must equal the corresponding angle in triangle ( FDE ). If more specific information about the angles in the triangles is provided, a precise measure for angle ( a ) can be calculated.
In a right triangle, the sum of the angles is always 180 degrees, with one angle measuring 90 degrees. Therefore, the measures of the other two angles, including angle ABC, must add up to 90 degrees. To find the measure of angle ABC, you would need the measure of the other non-right angle in the triangle. If, for example, angle BAC is known to be 30 degrees, then angle ABC would measure 60 degrees.
'a' and 'b' must both be acute, complementary angles.
The sum of the internal angles of a triangle is 180º. If B is a right angle it has 90º, so there are only 90º left for the other two angles, meaning that they cannot be right!
∠DAB + ∠EBA = 180� ⇒ 2∠CAB + 2∠CBA = 180� (Using (1) and (2)) ⇒ ∠CAB + ∠CBA = 90� In ∆ABC, ∠CAB + ∠CBA + ∠ABC = 180� (Angle sum property) ⇒ 90� + ∠ABC = 180� ⇒ ∠ABC = 180� - 90� = 90� Thus, the bisectors of two adjacent supplementary angles include a right angle.
The sum of the two angles is 360. So angle ABC = 120 degrees.
If triangle ABC is congruent to triangle FED, then the corresponding angles are equal. Therefore, angle C in triangle ABC is equal to angle D in triangle FED.
In a parallelogram, opposite angles are equal, and adjacent angles are supplementary. Since angle BAD equals 55 degrees, angle ABC, which is adjacent to angle BAD, can be calculated as 180 - 55. Therefore, angle ABC equals 125 degrees.
To prove that the base angles of an isosceles trapezoid are congruent, consider an isosceles trapezoid ( ABCD ) with ( AB \parallel CD ) and ( AD \cong BC ). By the properties of parallel lines, the angles ( \angle DAB ) and ( \angle ABC ) are consecutive interior angles formed by the transversal ( AD ) and ( BC ), respectively, thus ( \angle DAB + \angle ABC = 180^\circ ). Similarly, the angles ( \angle ADC ) and ( \angle BCD ) also sum to ( 180^\circ ). Since ( AD \cong BC ) and the trapezoid is isosceles, the two pairs of opposite angles must be equal, leading to ( \angle DAB \cong \angle ABC ) and ( \angle ADC \cong \angle BCD ), proving that the base angles ( \angle DAB ) and ( \angle ABC ) are congruent.
Yes
The 2 equal base angles are 45 degrees and all 3 interior angles add up to 180 degrees.
measure of exterior angle of triangle is equal to sum of interior angles. for eg. In triangle ABC, angle C is exterior angle angle A and angle B are interior angles so, C=A+B