Question

Using your protractor, draw an angle BAC of measure 120degree. With this angle as given,draw an angle of measure 90degree. Verify by measurement.​

Answer 1

$\angle BAC=120\ degree$ and $\angle BAG=90\ degree$ as shown in figure.

Step-by-step explanation:

Given,

Using your protractor, draw an $\angle BAC=120\ degree$ with this angle ,draw an angle $90\ degree$

Following steps:

• Draw any line segments $AB$ using scale.
• At $A$, draw an angle $120\ degree$ using protector like $\angle BAC=120\ degree$ as shown in the figure.
• $A$ as center and take any radius, draw a semi-circle which intersect line $AB\ and\ AC$ at $D\ and\ E$
• By the same radius and $D$ as center draw an arc on the semi-circle at $F$
• $E$ as center and any radius draw an arc and $F$ as center and same radius draw an arc which cuts the before arc at $G$
• Join $AG$

Where $\angle BAG=90\ degree$

Hence, $\angle BAC=120\ degree$ and $\angle BAG=90\ degree$ as shown in figure.