Show that angle a is equal to 90 degree

here is your answer

Step-by-step explanation:

In geometry and trigonometry , a right angle is an angle of exactly 90° (degrees) , corresponding to a quarter turn. If a ray is placed so that its endpoint is on a line and the adjacent angles are equal , then they are right angles.

hope it is helpful to you

answer: we have from thales theorem that because the 2 triangles are similar, jm/jk=jn/jl. we have that jn=x, jl=x+24 and that jm=7 and jk=28. substituting, we get:

x/(x+24)=7/28.

hence, x/(x+24)=1/4. this leads to 4x=x+24, 3x=24, x=8. we have solved for x=jn and this is equal to 8.

step-by-step explanation:

no not all of them.

step-by-step explanation:

some of them have a square base.