Give the approximate bond angle for a molecule with a trigonal planar shape.

Trigonal means it has 3 “legs”.
Because it is planar, the sum of the angles between all the legs must be 360°. Because the legs are all equally distanced from eachother, you divide the area uniformly.

This means you divide the 360° by the amount of legs:

360°/3 = 120°

Note: this only works in 2D planar configurations

Hahahahaha nice. my guess would be age or they moved the grocery store. ; ) and remind him next time you are late getting home that it takes a long time to go 12miles, hahahave a good one!