Rihanna hiked to a famous point with a beautiful view. It took 2 hours and 26 minutes to hike to the viewpoint and 26 to hike back. Rihanna spent 1 hour and 19 minutes enjoying the view at the top. She finshed the hike at 3:12 p. m. what time did rihanna start the hike to the viewpoint

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°