which equation would best solve the following problem the height of a triangle is 5 m less than its base. the area of the triangle is 42 m^2. find the length of the base. a. 42=x(x-5) b. 42=1/2(x)(x-5) c.42=x^2-5 d. 42=1/2(x^2-5)

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.°