Please provide geometry problems with explanations, and explain the terms.

The sum of the interior angles in any triangle is always $180^\circ$.

Let the three angles of the triangle be $\alpha$, $\beta$, and $\gamma$. We are given $\alpha = 50^\circ$ and $\beta = 65^\circ$. We need to find $\gamma$.

First, add the known angles:

Now, subtract $115^\circ$ from both sides to find $\gamma$:

The measure of the third interior angle is $\boxed{65^\circ}$.

Geometry : Area of a Rectangle

Problem: A rectangular garden has a length of 12 meters and a width of 7 meters. What is the area of the garden?

The area ($A$) of a rectangle is calculated by multiplying its length ($L$) by its width ($W$).

Given $L = 12$ meters and $W = 7$ meters.

The area of the garden is $\boxed{84 \text{ m}^2}$.

Explanation of Terms:

• Coast (Coastal) A coast is the land along a sea or ocean. It is the boundary where land meets a large body of water. The term coastal refers to anything related to or situated on a coast, such as coastal towns, coastal erosion, or coastal ecosystems.

• Savanna zone A savanna zone is a grassland ecosystem characterized by scattered trees that are not dense enough to form a closed canopy. These zones are typically found in tropical or subtropical regions and experience distinct wet and dry seasons. They support a wide variety of wildlife, particularly large grazing animals.

• Igoso dynasty I could not find historical information about an "Igoso dynasty." It is possible there might be a slight misspelling, or it refers to a very specific local or less documented historical entity. If you have more context or a different spelling, please provide it, and I can try to find more information.