Let's work through the questions visible in the image. I'll solve a few problems and explain the process:

Problem 10: Drawing Diagrams

You are given that a base angle in an isosceles triangle measures $37^\circ$. The task is to find the vertex angle.

• In an isosceles triangle, two angles are equal, and the sum of all interior angles of a triangle is $180^\circ$.
• If one base angle is $37^\circ$, the other base angle is also $37^\circ$.
• The vertex angle can be calculated as: $\text{Vertex angle} = 180^\circ - 37^\circ - 37^\circ = 106^\circ$

So, the vertex angle measures $106^\circ$.

Problem 11: Algebra - Find the value of $x$

This is a right triangle, and we can apply the Pythagorean theorem: $3x^2 + 5^2 = 10^2$ Simplify the equation: $3x^2 + 25 = 100$ Subtract 25 from both sides: $3x^2 = 75$ Divide by 3: $x^2 = 25$ Take the square root of both sides: $x = 5$

So, the value of $x$ is $5$.

Problem 12: Algebra - Find the value of $x$

You have another right triangle. Using the Pythagorean theorem again: $(5x)^2 + 12^2 = 13^2$ Simplify: $25x^2 + 144 = 169$ Subtract 144 from both sides: $25x^2 = 25$ Divide by 25: $x^2 = 1$ Take the square root: $x = 1$

So, $x = 1$.

Problem 14: Error Analysis

The error in the diagram involves assuming that side $BC = 6$, which is incorrect. Based on the triangle information (it looks like an isosceles triangle), the correct calculation for $BC$ should involve symmetry or trigonometry, depending on the full problem's details.

Problem 15: Algebra - Find $x$ and $y$

This is another case of using the Pythagorean theorem on the right triangle. If you give me the full sides, I can calculate the values of $x$ and $y$.

Would you like a deeper explanation or further steps for any of these problems?

Follow-up Questions:

1. Can we apply any trigonometric ratios to some triangles in the image for more practice?
2. How would we use the sine, cosine, or tangent functions to solve the angles?
3. Are there other properties of isosceles triangles that we can explore?
4. How do we apply the Pythagorean theorem in cases where only part of the side is known?
5. Could the diagram in problem 14 represent a case where similar triangles are involved?

Tip: Always start by analyzing the triangle's type (right, isosceles, etc.), as it determines which properties or theorems are applicable!