Question: 1.Solve for x in the diagram.
_Diagram: Two parallel lines with a transversal cutting through. Three angles between them: 26\degree, 64\degree, and x\degree at the bottom._
A. 26\degree
B. 28\degree
C. 38\degree
D. 64\degree
*2.* Two interior angles of a hexagon are 120\degree and 180\degree. If the remaining angles are the same, find the measure of each equal angle.
A. 180\degree
B. 120\degree
C. 105\degree
D. 90\degree
*3.* A rectangle with length 11cm has a perimeter equal to 38cm. Calculate the area of the rectangle.
A. 80cm\textsuperscript{2}
B. 88cm\textsuperscript{2}
C. 292cm\textsuperscript{2}
D. 418cm\textsuperscript{2}
*4.* The sum of interior angles of a regular polygon is 1260\degree. How many sides has the polygon?
A. 6
B. 7
C. 8
D. 9
*5.* A basic school learner decided to draw two intersecting lines and name them OX and OY. She placed a compass at O and drew an arc to intersect OX and OY at A and B respectively. With the compass point at A with a reasonable radius, she drew an arc in the space between XY and repeated same with compass point at B intersecting at C. What is the locus drawn from O through C?
A. Perpendicular bisector.
B. Angle bisector.
C. Circle bisector.
D. Intersection bisector.
1. **Problem:** Find $x$ in the diagram with two parallel lines cut by a transversal, angles given are $26^\circ$, $64^\circ$, and $x^\circ$.
2. **Formula and rules:** Angles on a straight line sum to $180^\circ$. Alternate interior angles between parallel lines are equal.
3. **Work:** The three angles $26^\circ$, $64^\circ$, and $x^\circ$ lie on a straight line, so:
$$26 + 64 + x = 180$$
$$90 + x = 180$$
$$x = 180 - 90 = 90$$
But $x$ is at the bottom between the parallel lines and transversal, so it is supplementary to $64^\circ$ (alternate interior angles), so $x = 64^\circ$.
4. **Answer:** $x = 64^\circ$ (Option D).
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1. **Problem:** Two interior angles of a hexagon are $120^\circ$ and $180^\circ$. The remaining four angles are equal. Find each equal angle.
2. **Formula:** Sum of interior angles of a polygon with $n$ sides is:
$$S = (n-2) \times 180$$
For hexagon, $n=6$:
$$S = (6-2) \times 180 = 4 \times 180 = 720^\circ$$
3. **Work:** Sum of known angles:
$$120 + 180 = 300^\circ$$
Sum of remaining four equal angles:
$$720 - 300 = 420^\circ$$
Each equal angle:
$$\frac{420}{4} = 105^\circ$$
4. **Answer:** Each equal angle is $105^\circ$ (Option C).
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1. **Problem:** Rectangle with length $11$ cm and perimeter $38$ cm. Find area.
2. **Formula:** Perimeter of rectangle:
$$P = 2(l + w)$$
Area:
$$A = l \times w$$
3. **Work:** Given $P=38$, $l=11$:
$$38 = 2(11 + w)$$
$$\frac{38}{2} = 11 + w$$
$$19 = 11 + w$$
$$w = 19 - 11 = 8$$
Area:
$$A = 11 \times 8 = 88$$
4. **Answer:** Area is $88$ cm\textsuperscript{2} (Option B).
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1. **Problem:** Sum of interior angles of a regular polygon is $1260^\circ$. Find number of sides.
2. **Formula:** Sum of interior angles:
$$S = (n-2) \times 180$$
3. **Work:** Given $S=1260$:
$$1260 = (n-2) \times 180$$
$$\frac{1260}{180} = n - 2$$
$$7 = n - 2$$
$$n = 7 + 2 = 9$$
4. **Answer:** Polygon has $9$ sides (Option D).
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1. **Problem:** Two intersecting lines OX and OY with arcs drawn from O intersecting OX and OY at A and B, arcs from A and B intersect at C. Find locus from O through C.
2. **Explanation:** The construction describes the angle bisector method using compass arcs.
3. **Answer:** The locus drawn from O through C is the **angle bisector** (Option B).