Can someone explain how pollen is made in detail but also dumb it down by a lot

The male parts of a plant, called stamens, make pollen grains. These grains contain sperm cells. The female parts of a plant, called pistils, contain egg cells. During pollination, pollen grains travel from the male parts to the female parts. There, a sperm cell from the pollen joins with an egg cell. The fertilized cell then develops into a seed. Some plants vary from only having male or only female parts. They need help transporting pollen between plants.  This is called cross-pollination. (This is where bees come in). Other plants have both male and female parts. They can pollinate themselves. This is called self-pollination.

Explanation:

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answer is  

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to prove that the triangles are congruent using the aas congruence