contestada

find the measure of the arc or angle indicated. assume that lines which appear tangent are tangent. just enter the number.

find the measure of the arc or angle indicated assume that lines which appear tangent are tangent just enter the number class=

Respuesta :

akposevictor

Answer:

C. 60°

Step-by-step explanation:

The vertical angle formed inside a circle when two chords intersect each other is equal to half the sum of the measures of the intercepted arcs, based on the intersecting chords angle measure theorem.

Thus:

90° = ½(120° + arc TA)

Multiply both sides by 2

2*90 = 120 + arc TA

180 = 120 + arc TA

Subtract 120 from each side

180 - 120 = arc TA

60° = arc TA

Arc TA = 60°

Otras preguntas