The picture below shows a portion of a river dam: a right angle triangle is shown with acute angle on base equal to 40 degrees and length of base equal to 100 meters. which of the following can be used to calculate the height of the river dam? 100 divided by sin 40 degrees 100 sin 40° 100 divided by tan 40 degrees 100 tan 40°

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.°