<h3>its a figure of hexagon</h3><h3>we know,</h3><h3> sum of hexagon: 720</h3><h3>now,</h3><h3> or, 97+a+165+143+2a: 720</h3><h3> or, 3a + 405: 720</h3><h3> or, 3a: 720 - 405</h3><h3> or, a : 315/3</h3><h3> or, a : 105</h3><h3>therefore, </h3><h3> a : 105</h3><h3> 2a : 2*105</h3><h3> : 210</h3>
Answer:
Plane R
Plane DEG
Plane FDG
Plane FEG
Step-by-step explanation:
You can name the plane by the script letter "R", and you can name the plane with any three co-linear points on the plane