We have a square here. All angles are congruent (90 degrees) so 20x would equal 90 degrees 20x=90 x=4.5 Now let’s double check 20x 20(4.5) 90 Yep the answer is choice B) x=4.5
<h3>let a number = a</h3><h3>it's cube will be a×a×a = a³</h3><h3>now atq 2a </h3><h3>it's cube will be </h3><h3>2a ×2a ×2a => 8a³ or (2a)³</h3><h2>Hope it helps you </h2>