Sjmarf@sh.itjust.works to People Twitter@sh.itjust.works · 18 hours agoThe value of xsh.itjust.worksimagemessage-square105fedilinkarrow-up1892arrow-down115
arrow-up1877arrow-down1imageThe value of xsh.itjust.worksSjmarf@sh.itjust.works to People Twitter@sh.itjust.works · 18 hours agomessage-square105fedilink
minus-squareswitchboard_pete@fedia.iolinkfedilinkarrow-up12arrow-down1·14 hours agothe answers here assume that the base is a continuous, straight line given one of the angles on the left triangle is a right angle on the diagram, but 80 if you calculate it, you can’t assume that
minus-squarebrisk@aussie.zonelinkfedilinkarrow-up9arrow-down1·12 hours agoThis is a standard way to draw geometric proofs, it’s not at all unreasonable to assume straight lines and unrepresentative angles.
minus-squareswitchboard_pete@fedia.iolinkfedilinkarrow-up3arrow-down1·11 hours agonormally in a geometric proof, a right angle is a right angle
minus-squarebrisk@aussie.zonelinkfedilinkarrow-up13·11 hours agoThis was certainly not my experience in high school. An unlabelled angle could never be assumed. Only angles marked with a square could be taken as right angles.
the answers here assume that the base is a continuous, straight line
given one of the angles on the left triangle is a right angle on the diagram, but 80 if you calculate it, you can’t assume that
This is a standard way to draw geometric proofs, it’s not at all unreasonable to assume straight lines and unrepresentative angles.
normally in a geometric proof, a right angle is a right angle
This was certainly not my experience in high school. An unlabelled angle could never be assumed. Only angles marked with a square could be taken as right angles.
guess you’re right!